Finding the Fourth Proportional to 901,378,061,608.48, 1,243,931,556,385.80 and 495,399,993,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   901,378,061,608.48 : 1,243,931,556,385.80 = 495,399,993,010.72 : x
2. Step 2: Convert to fraction form
   901,378,061,608.48/1,243,931,556,385.80 = 495,399,993,010.72/x
3. Step 3: Cross multiply
   901,378,061,608.48x = 1,243,931,556,385.80 × 495,399,993,010.72
4. Step 4: Simplify right side
   901,378,061,608.48x = 616,243,684,339,339,338,186,752
5. Step 5: Solve for x
   x = 616,243,684,339,339,338,186,752/901,378,061,608.48
6. Step 6: Final answer
   x = 683,668,385,759.99