Finding the Fourth Proportional to 22,560, 31,134.27 and 12,624

Step by Step Solution

1. Step 1: Write the proportion equation
   22,560 : 31,134.27 = 12,624 : x
2. Step 2: Convert to fraction form
   22,560/31,134.27 = 12,624/x
3. Step 3: Cross multiply
   22,560x = 31,134.27 × 12,624
4. Step 4: Simplify right side
   22,560x = 393,039,024.48
5. Step 5: Solve for x
   x = 393,039,024.48/22,560
6. Step 6: Final answer
   x = 17,421.94