Finding the Fourth Proportional to 1,018.36, 1,525.83 and 498.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.36 : 1,525.83 = 498.61 : x
2. Step 2: Convert to fraction form
   1,018.36/1,525.83 = 498.61/x
3. Step 3: Cross multiply
   1,018.36x = 1,525.83 × 498.61
4. Step 4: Simplify right side
   1,018.36x = 760,794.10
5. Step 5: Solve for x
   x = 760,794.10/1,018.36
6. Step 6: Final answer
   x = 747.08