Finding the Third Proportional to 72,678,331 and 111,711,602

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,331 : 111,711,602 = 111,711,602 : x
2. Step 2: Convert to fraction form
   72,678,331/111,711,602 = 111,711,602/x
3. Step 3: Cross multiply
   72,678,331x = 111,711,602 × 111,711,602
4. Step 4: Simplify right side
   72,678,331x = 12,479,482,021,406,404
5. Step 5: Solve for x
   x = 12,479,482,021,406,404/72,678,331
6. Step 6: Final answer
   x = 171,708,428.77