Finding the Fourth Proportional to 13,229.52, 18,259.86 and 8,987.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,229.52 : 18,259.86 = 8,987.55 : x
2. Step 2: Convert to fraction form
   13,229.52/18,259.86 = 8,987.55/x
3. Step 3: Cross multiply
   13,229.52x = 18,259.86 × 8,987.55
4. Step 4: Simplify right side
   13,229.52x = 164,111,404.74
5. Step 5: Solve for x
   x = 164,111,404.74/13,229.52
6. Step 6: Final answer
   x = 12,404.94