Finding the Fourth Proportional to 22,590, 31,174.20 and 12,654

Step by Step Solution

1. Step 1: Write the proportion equation
   22,590 : 31,174.20 = 12,654 : x
2. Step 2: Convert to fraction form
   22,590/31,174.20 = 12,654/x
3. Step 3: Cross multiply
   22,590x = 31,174.20 × 12,654
4. Step 4: Simplify right side
   22,590x = 394,478,326.80
5. Step 5: Solve for x
   x = 394,478,326.80/22,590
6. Step 6: Final answer
   x = 17,462.52