Finding the Fourth Proportional to 22,521.86, 31,078.81 and 12,449.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521.86 : 31,078.81 = 12,449.69 : x
2. Step 2: Convert to fraction form
   22,521.86/31,078.81 = 12,449.69/x
3. Step 3: Cross multiply
   22,521.86x = 31,078.81 × 12,449.69
4. Step 4: Simplify right side
   22,521.86x = 386,921,550.07
5. Step 5: Solve for x
   x = 386,921,550.07/22,521.86
6. Step 6: Final answer
   x = 17,179.82