Finding the Fourth Proportional to 15,292.72, 21,108.32 and 9,008.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,292.72 : 21,108.32 = 9,008.72 : x
2. Step 2: Convert to fraction form
   15,292.72/21,108.32 = 9,008.72/x
3. Step 3: Cross multiply
   15,292.72x = 21,108.32 × 9,008.72
4. Step 4: Simplify right side
   15,292.72x = 190,158,944.55
5. Step 5: Solve for x
   x = 190,158,944.55/15,292.72
6. Step 6: Final answer
   x = 12,434.61