Finding the Fourth Proportional to 14,987.31, 20,673.59 and 9,685.26

Step by Step Solution

1. Step 1: Write the proportion equation
   14,987.31 : 20,673.59 = 9,685.26 : x
2. Step 2: Convert to fraction form
   14,987.31/20,673.59 = 9,685.26/x
3. Step 3: Cross multiply
   14,987.31x = 20,673.59 × 9,685.26
4. Step 4: Simplify right side
   14,987.31x = 200,229,045.86
5. Step 5: Solve for x
   x = 200,229,045.86/14,987.31
6. Step 6: Final answer
   x = 13,359.91