Finding the Fourth Proportional to 22,688.88, 31,308.84 and 12,617.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,688.88 : 31,308.84 = 12,617.34 : x
2. Step 2: Convert to fraction form
   22,688.88/31,308.84 = 12,617.34/x
3. Step 3: Cross multiply
   22,688.88x = 31,308.84 × 12,617.34
4. Step 4: Simplify right side
   22,688.88x = 395,034,279.29
5. Step 5: Solve for x
   x = 395,034,279.29/22,688.88
6. Step 6: Final answer
   x = 17,410.92