Finding the Fourth Proportional to 1,320.35, 1,980.15 and 498.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.35 : 1,980.15 = 498.02 : x
2. Step 2: Convert to fraction form
   1,320.35/1,980.15 = 498.02/x
3. Step 3: Cross multiply
   1,320.35x = 1,980.15 × 498.02
4. Step 4: Simplify right side
   1,320.35x = 986,154.30
5. Step 5: Solve for x
   x = 986,154.30/1,320.35
6. Step 6: Final answer
   x = 746.89