Finding the Third Proportional to 81,870,682.50 and 177,555,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,870,682.50 : 177,555,028.50 = 177,555,028.50 : x
2. Step 2: Convert to fraction form
   81,870,682.50/177,555,028.50 = 177,555,028.50/x
3. Step 3: Cross multiply
   81,870,682.50x = 177,555,028.50 × 177,555,028.50
4. Step 4: Simplify right side
   81,870,682.50x = 31,525,788,145,635,812
5. Step 5: Solve for x
   x = 31,525,788,145,635,812/81,870,682.50
6. Step 6: Final answer
   x = 385,068,099.87