Finding the Fourth Proportional to 22,811.25, 31,479.54 and 12,875.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,811.25 : 31,479.54 = 12,875.25 : x
2. Step 2: Convert to fraction form
   22,811.25/31,479.54 = 12,875.25/x
3. Step 3: Cross multiply
   22,811.25x = 31,479.54 × 12,875.25
4. Step 4: Simplify right side
   22,811.25x = 405,306,947.39
5. Step 5: Solve for x
   x = 405,306,947.39/22,811.25
6. Step 6: Final answer
   x = 17,767.85