Finding the Fourth Proportional to 22,478.13, 31,021.71 and 12,407.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,478.13 : 31,021.71 = 12,407.52 : x
2. Step 2: Convert to fraction form
   22,478.13/31,021.71 = 12,407.52/x
3. Step 3: Cross multiply
   22,478.13x = 31,021.71 × 12,407.52
4. Step 4: Simplify right side
   22,478.13x = 384,902,487.26
5. Step 5: Solve for x
   x = 384,902,487.26/22,478.13
6. Step 6: Final answer
   x = 17,123.42