Finding the Fourth Proportional to 22,470.34, 31,008.54 and 12,398.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,470.34 : 31,008.54 = 12,398.78 : x
2. Step 2: Convert to fraction form
   22,470.34/31,008.54 = 12,398.78/x
3. Step 3: Cross multiply
   22,470.34x = 31,008.54 × 12,398.78
4. Step 4: Simplify right side
   22,470.34x = 384,468,143.10
5. Step 5: Solve for x
   x = 384,468,143.10/22,470.34
6. Step 6: Final answer
   x = 17,110.03