Finding the Fourth Proportional to 31,033.86, 42,829.88 and 18,290.99

Step by Step Solution

1. Step 1: Write the proportion equation
   31,033.86 : 42,829.88 = 18,290.99 : x
2. Step 2: Convert to fraction form
   31,033.86/42,829.88 = 18,290.99/x
3. Step 3: Cross multiply
   31,033.86x = 42,829.88 × 18,290.99
4. Step 4: Simplify right side
   31,033.86x = 783,400,906.78
5. Step 5: Solve for x
   x = 783,400,906.78/31,033.86
6. Step 6: Final answer
   x = 25,243.42