Finding the Fourth Proportional to 31,258.40, 43,136.50 and 17,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,258.40 : 43,136.50 = 17,111.12 : x
2. Step 2: Convert to fraction form
   31,258.40/43,136.50 = 17,111.12/x
3. Step 3: Cross multiply
   31,258.40x = 43,136.50 × 17,111.12
4. Step 4: Simplify right side
   31,258.40x = 738,113,827.88
5. Step 5: Solve for x
   x = 738,113,827.88/31,258.40
6. Step 6: Final answer
   x = 23,613.30