Finding the Fourth Proportional to 31,388.52, 43,313.94 and 17,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,388.52 : 43,313.94 = 17,238.72 : x
2. Step 2: Convert to fraction form
   31,388.52/43,313.94 = 17,238.72/x
3. Step 3: Cross multiply
   31,388.52x = 43,313.94 × 17,238.72
4. Step 4: Simplify right side
   31,388.52x = 746,676,883.76
5. Step 5: Solve for x
   x = 746,676,883.76/31,388.52
6. Step 6: Final answer
   x = 23,788.22