Finding the Third Proportional to 18,402.75 and 39,719.88

Step by Step Solution

1. Step 1: Write the proportion equation
   18,402.75 : 39,719.88 = 39,719.88 : x
2. Step 2: Convert to fraction form
   18,402.75/39,719.88 = 39,719.88/x
3. Step 3: Cross multiply
   18,402.75x = 39,719.88 × 39,719.88
4. Step 4: Simplify right side
   18,402.75x = 1,577,668,470.02
5. Step 5: Solve for x
   x = 1,577,668,470.02/18,402.75
6. Step 6: Final answer
   x = 85,730.04