Finding the Fourth Proportional to 22,617.63, 31,211.59 and 13,663.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,617.63 : 31,211.59 = 13,663.57 : x
2. Step 2: Convert to fraction form
   22,617.63/31,211.59 = 13,663.57/x
3. Step 3: Cross multiply
   22,617.63x = 31,211.59 × 13,663.57
4. Step 4: Simplify right side
   22,617.63x = 426,461,744.78
5. Step 5: Solve for x
   x = 426,461,744.78/22,617.63
6. Step 6: Final answer
   x = 18,855.28