Finding the Fourth Proportional to 1,018.27, 1,405.21 and 552.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.27 : 1,405.21 = 552.52 : x
2. Step 2: Convert to fraction form
   1,018.27/1,405.21 = 552.52/x
3. Step 3: Cross multiply
   1,018.27x = 1,405.21 × 552.52
4. Step 4: Simplify right side
   1,018.27x = 776,408.04
5. Step 5: Solve for x
   x = 776,408.04/1,018.27
6. Step 6: Final answer
   x = 762.48