Finding the Fourth Proportional to 22,564, 31,138.56 and 12,492.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,564 : 31,138.56 = 12,492.64 : x
2. Step 2: Convert to fraction form
   22,564/31,138.56 = 12,492.64/x
3. Step 3: Cross multiply
   22,564x = 31,138.56 × 12,492.64
4. Step 4: Simplify right side
   22,564x = 389,002,820.20
5. Step 5: Solve for x
   x = 389,002,820.20/22,564
6. Step 6: Final answer
   x = 17,239.98