Finding the Third Proportional to 53,145,072 and 86,780,376

Step by Step Solution

1. Step 1: Write the proportion equation
   53,145,072 : 86,780,376 = 86,780,376 : x
2. Step 2: Convert to fraction form
   53,145,072/86,780,376 = 86,780,376/x
3. Step 3: Cross multiply
   53,145,072x = 86,780,376 × 86,780,376
4. Step 4: Simplify right side
   53,145,072x = 7,530,833,658,701,376
5. Step 5: Solve for x
   x = 7,530,833,658,701,376/53,145,072
6. Step 6: Final answer
   x = 141,703,329.68