Finding the Fourth Proportional to 31,386.48, 43,312.35 and 17,238.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,386.48 : 43,312.35 = 17,238.42 : x
2. Step 2: Convert to fraction form
   31,386.48/43,312.35 = 17,238.42/x
3. Step 3: Cross multiply
   31,386.48x = 43,312.35 × 17,238.42
4. Step 4: Simplify right side
   31,386.48x = 746,636,480.49
5. Step 5: Solve for x
   x = 746,636,480.49/31,386.48
6. Step 6: Final answer
   x = 23,788.47