Finding the Fourth Proportional to 671,107.69, 926,128.72 and 369,301.69

Step by Step Solution

1. Step 1: Write the proportion equation
   671,107.69 : 926,128.72 = 369,301.69 : x
2. Step 2: Convert to fraction form
   671,107.69/926,128.72 = 369,301.69/x
3. Step 3: Cross multiply
   671,107.69x = 926,128.72 × 369,301.69
4. Step 4: Simplify right side
   671,107.69x = 342,020,901,453.54
5. Step 5: Solve for x
   x = 342,020,901,453.54/671,107.69
6. Step 6: Final answer
   x = 509,636.39