Finding the Third Proportional to 18,245.88 and 39,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,245.88 : 39,490.50 = 39,490.50 : x
2. Step 2: Convert to fraction form
   18,245.88/39,490.50 = 39,490.50/x
3. Step 3: Cross multiply
   18,245.88x = 39,490.50 × 39,490.50
4. Step 4: Simplify right side
   18,245.88x = 1,559,499,590.25
5. Step 5: Solve for x
   x = 1,559,499,590.25/18,245.88
6. Step 6: Final answer
   x = 85,471.35