Finding the Fourth Proportional to 1,025.30, 1,538.17 and 331.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.30 : 1,538.17 = 331.99 : x
2. Step 2: Convert to fraction form
   1,025.30/1,538.17 = 331.99/x
3. Step 3: Cross multiply
   1,025.30x = 1,538.17 × 331.99
4. Step 4: Simplify right side
   1,025.30x = 510,657.06
5. Step 5: Solve for x
   x = 510,657.06/1,025.30
6. Step 6: Final answer
   x = 498.06