Finding the Fourth Proportional to 1,018.29, 1,405.24 and 552.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.29 : 1,405.24 = 552.54 : x
2. Step 2: Convert to fraction form
   1,018.29/1,405.24 = 552.54/x
3. Step 3: Cross multiply
   1,018.29x = 1,405.24 × 552.54
4. Step 4: Simplify right side
   1,018.29x = 776,449.93
5. Step 5: Solve for x
   x = 776,449.93/1,018.29
6. Step 6: Final answer
   x = 762.50