Finding the Fourth Proportional to 22,659.60, 31,271.31 and 12,588.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,659.60 : 31,271.31 = 12,588.06 : x
2. Step 2: Convert to fraction form
   22,659.60/31,271.31 = 12,588.06/x
3. Step 3: Cross multiply
   22,659.60x = 31,271.31 × 12,588.06
4. Step 4: Simplify right side
   22,659.60x = 393,645,126.56
5. Step 5: Solve for x
   x = 393,645,126.56/22,659.60
6. Step 6: Final answer
   x = 17,372.11