Finding the Fourth Proportional to 22,660.56, 31,271.94 and 12,590.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,660.56 : 31,271.94 = 12,590.10 : x
2. Step 2: Convert to fraction form
   22,660.56/31,271.94 = 12,590.10/x
3. Step 3: Cross multiply
   22,660.56x = 31,271.94 × 12,590.10
4. Step 4: Simplify right side
   22,660.56x = 393,716,851.79
5. Step 5: Solve for x
   x = 393,716,851.79/22,660.56
6. Step 6: Final answer
   x = 17,374.54