Finding the Third Proportional to 99,038,146.50 and 217,208,142

Step by Step Solution

1. Step 1: Write the proportion equation
   99,038,146.50 : 217,208,142 = 217,208,142 : x
2. Step 2: Convert to fraction form
   99,038,146.50/217,208,142 = 217,208,142/x
3. Step 3: Cross multiply
   99,038,146.50x = 217,208,142 × 217,208,142
4. Step 4: Simplify right side
   99,038,146.50x = 47,179,376,951,092,160
5. Step 5: Solve for x
   x = 47,179,376,951,092,160/99,038,146.50
6. Step 6: Final answer
   x = 476,375,806.88