Finding the Fourth Proportional to 22,615.17, 31,216.16 and 13,185.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,615.17 : 31,216.16 = 13,185.56 : x
2. Step 2: Convert to fraction form
   22,615.17/31,216.16 = 13,185.56/x
3. Step 3: Cross multiply
   22,615.17x = 31,216.16 × 13,185.56
4. Step 4: Simplify right side
   22,615.17x = 411,602,536.77
5. Step 5: Solve for x
   x = 411,602,536.77/22,615.17
6. Step 6: Final answer
   x = 18,200.28