Finding the Fourth Proportional to 31,384.55, 43,310.75 and 17,238.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,384.55 : 43,310.75 = 17,238.30 : x
2. Step 2: Convert to fraction form
   31,384.55/43,310.75 = 17,238.30/x
3. Step 3: Cross multiply
   31,384.55x = 43,310.75 × 17,238.30
4. Step 4: Simplify right side
   31,384.55x = 746,603,615.53
5. Step 5: Solve for x
   x = 746,603,615.53/31,384.55
6. Step 6: Final answer
   x = 23,788.89