Finding the Fourth Proportional to 1,319.83, 1,980.18 and 498.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319.83 : 1,980.18 = 498.17 : x
2. Step 2: Convert to fraction form
   1,319.83/1,980.18 = 498.17/x
3. Step 3: Cross multiply
   1,319.83x = 1,980.18 × 498.17
4. Step 4: Simplify right side
   1,319.83x = 986,471.22
5. Step 5: Solve for x
   x = 986,471.22/1,319.83
6. Step 6: Final answer
   x = 747.42