Finding the Third Proportional to 56,821.50 and 89,137.13

Step by Step Solution

1. Step 1: Write the proportion equation
   56,821.50 : 89,137.13 = 89,137.13 : x
2. Step 2: Convert to fraction form
   56,821.50/89,137.13 = 89,137.13/x
3. Step 3: Cross multiply
   56,821.50x = 89,137.13 × 89,137.13
4. Step 4: Simplify right side
   56,821.50x = 7,945,427,053.27
5. Step 5: Solve for x
   x = 7,945,427,053.27/56,821.50
6. Step 6: Final answer
   x = 139,831.35