Finding the Third Proportional to 18,019.50 and 39,432.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,019.50 : 39,432.75 = 39,432.75 : x
2. Step 2: Convert to fraction form
   18,019.50/39,432.75 = 39,432.75/x
3. Step 3: Cross multiply
   18,019.50x = 39,432.75 × 39,432.75
4. Step 4: Simplify right side
   18,019.50x = 1,554,941,772.56
5. Step 5: Solve for x
   x = 1,554,941,772.56/18,019.50
6. Step 6: Final answer
   x = 86,292.17