Finding the Fourth Proportional to 22,662.79, 31,274.10 and 12,590.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,662.79 : 31,274.10 = 12,590.74 : x
2. Step 2: Convert to fraction form
   22,662.79/31,274.10 = 12,590.74/x
3. Step 3: Cross multiply
   22,662.79x = 31,274.10 × 12,590.74
4. Step 4: Simplify right side
   22,662.79x = 393,764,100.93
5. Step 5: Solve for x
   x = 393,764,100.93/22,662.79
6. Step 6: Final answer
   x = 17,374.92