Finding the Fourth Proportional to 22,549.59, 31,119.99 and 12,478.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,549.59 : 31,119.99 = 12,478.45 : x
2. Step 2: Convert to fraction form
   22,549.59/31,119.99 = 12,478.45/x
3. Step 3: Cross multiply
   22,549.59x = 31,119.99 × 12,478.45
4. Step 4: Simplify right side
   22,549.59x = 388,329,285.82
5. Step 5: Solve for x
   x = 388,329,285.82/22,549.59
6. Step 6: Final answer
   x = 17,221.13