Finding the Fourth Proportional to 1,123.01, 1,549.74 and 618.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.01 : 1,549.74 = 618.86 : x
2. Step 2: Convert to fraction form
   1,123.01/1,549.74 = 618.86/x
3. Step 3: Cross multiply
   1,123.01x = 1,549.74 × 618.86
4. Step 4: Simplify right side
   1,123.01x = 959,064.35
5. Step 5: Solve for x
   x = 959,064.35/1,123.01
6. Step 6: Final answer
   x = 854.02