Finding the Fourth Proportional to 31,099.28, 42,912.18 and 17,486.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,099.28 : 42,912.18 = 17,486.82 : x
2. Step 2: Convert to fraction form
   31,099.28/42,912.18 = 17,486.82/x
3. Step 3: Cross multiply
   31,099.28x = 42,912.18 × 17,486.82
4. Step 4: Simplify right side
   31,099.28x = 750,397,567.47
5. Step 5: Solve for x
   x = 750,397,567.47/31,099.28
6. Step 6: Final answer
   x = 24,129.10