Finding the Fourth Proportional to 22,638.89, 31,238.32 and 12,567.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,638.89 : 31,238.32 = 12,567.40 : x
2. Step 2: Convert to fraction form
   22,638.89/31,238.32 = 12,567.40/x
3. Step 3: Cross multiply
   22,638.89x = 31,238.32 × 12,567.40
4. Step 4: Simplify right side
   22,638.89x = 392,584,462.77
5. Step 5: Solve for x
   x = 392,584,462.77/22,638.89
6. Step 6: Final answer
   x = 17,341.15