Finding the Fourth Proportional to 22,478.08, 31,019.25 and 12,405.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,478.08 : 31,019.25 = 12,405.92 : x
2. Step 2: Convert to fraction form
   22,478.08/31,019.25 = 12,405.92/x
3. Step 3: Cross multiply
   22,478.08x = 31,019.25 × 12,405.92
4. Step 4: Simplify right side
   22,478.08x = 384,822,443.49
5. Step 5: Solve for x
   x = 384,822,443.49/22,478.08
6. Step 6: Final answer
   x = 17,119.90