Finding the Fourth Proportional to 353,978.28, 533,635.83 and 331,146

Step by Step Solution

1. Step 1: Write the proportion equation
   353,978.28 : 533,635.83 = 331,146 : x
2. Step 2: Convert to fraction form
   353,978.28/533,635.83 = 331,146/x
3. Step 3: Cross multiply
   353,978.28x = 533,635.83 × 331,146
4. Step 4: Simplify right side
   353,978.28x = 176,711,370,561.18
5. Step 5: Solve for x
   x = 176,711,370,561.18/353,978.28
6. Step 6: Final answer
   x = 499,215.29