Finding the Fourth Proportional to 17,945.56, 24,765.65 and 9,987.31

Step by Step Solution

1. Step 1: Write the proportion equation
   17,945.56 : 24,765.65 = 9,987.31 : x
2. Step 2: Convert to fraction form
   17,945.56/24,765.65 = 9,987.31/x
3. Step 3: Cross multiply
   17,945.56x = 24,765.65 × 9,987.31
4. Step 4: Simplify right side
   17,945.56x = 247,342,223.90
5. Step 5: Solve for x
   x = 247,342,223.90/17,945.56
6. Step 6: Final answer
   x = 13,782.92