Finding the Third Proportional to 61,618.50 and 89,025.75

Step by Step Solution

1. Step 1: Write the proportion equation
   61,618.50 : 89,025.75 = 89,025.75 : x
2. Step 2: Convert to fraction form
   61,618.50/89,025.75 = 89,025.75/x
3. Step 3: Cross multiply
   61,618.50x = 89,025.75 × 89,025.75
4. Step 4: Simplify right side
   61,618.50x = 7,925,584,163.06
5. Step 5: Solve for x
   x = 7,925,584,163.06/61,618.50
6. Step 6: Final answer
   x = 128,623.45