Finding the Fourth Proportional to 22,838.55, 31,517.90 and 12,767.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,838.55 : 31,517.90 = 12,767.42 : x
2. Step 2: Convert to fraction form
   22,838.55/31,517.90 = 12,767.42/x
3. Step 3: Cross multiply
   22,838.55x = 31,517.90 × 12,767.42
4. Step 4: Simplify right side
   22,838.55x = 402,402,152.37
5. Step 5: Solve for x
   x = 402,402,152.37/22,838.55
6. Step 6: Final answer
   x = 17,619.43