Finding the Fourth Proportional to 1,018.48, 1,405.50 and 552.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.48 : 1,405.50 = 552.73 : x
2. Step 2: Convert to fraction form
   1,018.48/1,405.50 = 552.73/x
3. Step 3: Cross multiply
   1,018.48x = 1,405.50 × 552.73
4. Step 4: Simplify right side
   1,018.48x = 776,856.67
5. Step 5: Solve for x
   x = 776,856.67/1,018.48
6. Step 6: Final answer
   x = 762.76