Finding the Fourth Proportional to 31,099.17, 42,915.24 and 17,668.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,099.17 : 42,915.24 = 17,668.56 : x
2. Step 2: Convert to fraction form
   31,099.17/42,915.24 = 17,668.56/x
3. Step 3: Cross multiply
   31,099.17x = 42,915.24 × 17,668.56
4. Step 4: Simplify right side
   31,099.17x = 758,250,578.06
5. Step 5: Solve for x
   x = 758,250,578.06/31,099.17
6. Step 6: Final answer
   x = 24,381.70