Finding the Fourth Proportional to 22,660.29, 31,271.00 and 12,588.75

Step by Step Solution

1. Step 1: Write the proportion equation
   22,660.29 : 31,271.00 = 12,588.75 : x
2. Step 2: Convert to fraction form
   22,660.29/31,271.00 = 12,588.75/x
3. Step 3: Cross multiply
   22,660.29x = 31,271.00 × 12,588.75
4. Step 4: Simplify right side
   22,660.29x = 393,662,738.31
5. Step 5: Solve for x
   x = 393,662,738.31/22,660.29
6. Step 6: Final answer
   x = 17,372.36