Finding the Fourth Proportional to 31,035.76, 42,821.87 and 18,289.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,035.76 : 42,821.87 = 18,289.46 : x
2. Step 2: Convert to fraction form
   31,035.76/42,821.87 = 18,289.46/x
3. Step 3: Cross multiply
   31,035.76x = 42,821.87 × 18,289.46
4. Step 4: Simplify right side
   31,035.76x = 783,188,894.10
5. Step 5: Solve for x
   x = 783,188,894.10/31,035.76
6. Step 6: Final answer
   x = 25,235.05