Finding the Fourth Proportional to 15,131.48, 20,883.15 and 8,671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,131.48 : 20,883.15 = 8,671.72 : x
2. Step 2: Convert to fraction form
   15,131.48/20,883.15 = 8,671.72/x
3. Step 3: Cross multiply
   15,131.48x = 20,883.15 × 8,671.72
4. Step 4: Simplify right side
   15,131.48x = 181,092,829.52
5. Step 5: Solve for x
   x = 181,092,829.52/15,131.48
6. Step 6: Final answer
   x = 11,967.95