Finding the Fourth Proportional to 1,320.06, 1,980.01 and 498.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.06 : 1,980.01 = 498.23 : x
2. Step 2: Convert to fraction form
   1,320.06/1,980.01 = 498.23/x
3. Step 3: Cross multiply
   1,320.06x = 1,980.01 × 498.23
4. Step 4: Simplify right side
   1,320.06x = 986,500.38
5. Step 5: Solve for x
   x = 986,500.38/1,320.06
6. Step 6: Final answer
   x = 747.31