Finding the Third Proportional to 39,718.13 and 87,432.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,718.13 : 87,432.75 = 87,432.75 : x
2. Step 2: Convert to fraction form
   39,718.13/87,432.75 = 87,432.75/x
3. Step 3: Cross multiply
   39,718.13x = 87,432.75 × 87,432.75
4. Step 4: Simplify right side
   39,718.13x = 7,644,485,772.56
5. Step 5: Solve for x
   x = 7,644,485,772.56/39,718.13
6. Step 6: Final answer
   x = 192,468.45