Finding the Fourth Proportional to 1,320.00, 1,980.45 and 498.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.00 : 1,980.45 = 498.51 : x
2. Step 2: Convert to fraction form
   1,320.00/1,980.45 = 498.51/x
3. Step 3: Cross multiply
   1,320.00x = 1,980.45 × 498.51
4. Step 4: Simplify right side
   1,320.00x = 987,261.73
5. Step 5: Solve for x
   x = 987,261.73/1,320.00
6. Step 6: Final answer
   x = 747.93