Finding the Third Proportional to 39,399 and 57,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,399 : 57,412.50 = 57,412.50 : x
2. Step 2: Convert to fraction form
   39,399/57,412.50 = 57,412.50/x
3. Step 3: Cross multiply
   39,399x = 57,412.50 × 57,412.50
4. Step 4: Simplify right side
   39,399x = 3,296,195,156.25
5. Step 5: Solve for x
   x = 3,296,195,156.25/39,399
6. Step 6: Final answer
   x = 83,661.90