Finding the Third Proportional to 57,489.75 and 87,206.63

Step by Step Solution

1. Step 1: Write the proportion equation
   57,489.75 : 87,206.63 = 87,206.63 : x
2. Step 2: Convert to fraction form
   57,489.75/87,206.63 = 87,206.63/x
3. Step 3: Cross multiply
   57,489.75x = 87,206.63 × 87,206.63
4. Step 4: Simplify right side
   57,489.75x = 7,604,995,443.89
5. Step 5: Solve for x
   x = 7,604,995,443.89/57,489.75
6. Step 6: Final answer
   x = 132,284.37