Finding the Third Proportional to 55,321,717.50 and 81,188,959.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,321,717.50 : 81,188,959.50 = 81,188,959.50 : x
2. Step 2: Convert to fraction form
   55,321,717.50/81,188,959.50 = 81,188,959.50/x
3. Step 3: Cross multiply
   55,321,717.50x = 81,188,959.50 × 81,188,959.50
4. Step 4: Simplify right side
   55,321,717.50x = 6,591,647,144,692,640
5. Step 5: Solve for x
   x = 6,591,647,144,692,640/55,321,717.50
6. Step 6: Final answer
   x = 119,151,165.99