Finding the Third Proportional to 57,658.50 and 89,484.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,658.50 : 89,484.75 = 89,484.75 : x
2. Step 2: Convert to fraction form
   57,658.50/89,484.75 = 89,484.75/x
3. Step 3: Cross multiply
   57,658.50x = 89,484.75 × 89,484.75
4. Step 4: Simplify right side
   57,658.50x = 8,007,520,482.56
5. Step 5: Solve for x
   x = 8,007,520,482.56/57,658.50
6. Step 6: Final answer
   x = 138,878.40