Finding the Fourth Proportional to 1,105.32, 1,657.42 and 618.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.32 : 1,657.42 = 618.24 : x
2. Step 2: Convert to fraction form
   1,105.32/1,657.42 = 618.24/x
3. Step 3: Cross multiply
   1,105.32x = 1,657.42 × 618.24
4. Step 4: Simplify right side
   1,105.32x = 1,024,683.34
5. Step 5: Solve for x
   x = 1,024,683.34/1,105.32
6. Step 6: Final answer
   x = 927.05