Finding the Fourth Proportional to 22,572.40, 31,147.14 and 12,499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,572.40 : 31,147.14 = 12,499.42 : x
2. Step 2: Convert to fraction form
   22,572.40/31,147.14 = 12,499.42/x
3. Step 3: Cross multiply
   22,572.40x = 31,147.14 × 12,499.42
4. Step 4: Simplify right side
   22,572.40x = 389,321,184.66
5. Step 5: Solve for x
   x = 389,321,184.66/22,572.40
6. Step 6: Final answer
   x = 17,247.66