Finding the Fourth Proportional to 31,083.39, 42,900.63 and 18,335.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,083.39 : 42,900.63 = 18,335.79 : x
2. Step 2: Convert to fraction form
   31,083.39/42,900.63 = 18,335.79/x
3. Step 3: Cross multiply
   31,083.39x = 42,900.63 × 18,335.79
4. Step 4: Simplify right side
   31,083.39x = 786,616,942.55
5. Step 5: Solve for x
   x = 786,616,942.55/31,083.39
6. Step 6: Final answer
   x = 25,306.67