Finding the Fourth Proportional to 31,032.86, 42,828.50 and 18,289.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.86 : 42,828.50 = 18,289.98 : x
2. Step 2: Convert to fraction form
   31,032.86/42,828.50 = 18,289.98/x
3. Step 3: Cross multiply
   31,032.86x = 42,828.50 × 18,289.98
4. Step 4: Simplify right side
   31,032.86x = 783,332,316.98
5. Step 5: Solve for x
   x = 783,332,316.98/31,032.86
6. Step 6: Final answer
   x = 25,242.03