Finding the Fourth Proportional to 22,588.81, 31,170.96 and 12,516.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,588.81 : 31,170.96 = 12,516.28 : x
2. Step 2: Convert to fraction form
   22,588.81/31,170.96 = 12,516.28/x
3. Step 3: Cross multiply
   22,588.81x = 31,170.96 × 12,516.28
4. Step 4: Simplify right side
   22,588.81x = 390,144,385.30
5. Step 5: Solve for x
   x = 390,144,385.30/22,588.81
6. Step 6: Final answer
   x = 17,271.58