Finding the Third Proportional to 72,678,310.50 and 111,711,577.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,310.50 : 111,711,577.50 = 111,711,577.50 : x
2. Step 2: Convert to fraction form
   72,678,310.50/111,711,577.50 = 111,711,577.50/x
3. Step 3: Cross multiply
   72,678,310.50x = 111,711,577.50 × 111,711,577.50
4. Step 4: Simplify right side
   72,678,310.50x = 12,479,476,547,538,506
5. Step 5: Solve for x
   x = 12,479,476,547,538,506/72,678,310.50
6. Step 6: Final answer
   x = 171,708,401.88