Finding the Third Proportional to 56,800.50 and 89,109.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,800.50 : 89,109.75 = 89,109.75 : x
2. Step 2: Convert to fraction form
   56,800.50/89,109.75 = 89,109.75/x
3. Step 3: Cross multiply
   56,800.50x = 89,109.75 × 89,109.75
4. Step 4: Simplify right side
   56,800.50x = 7,940,547,545.06
5. Step 5: Solve for x
   x = 7,940,547,545.06/56,800.50
6. Step 6: Final answer
   x = 139,797.14