Finding the Fourth Proportional to 2,261.39, 3,391.72 and 618.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.39 : 3,391.72 = 618.05 : x
2. Step 2: Convert to fraction form
   2,261.39/3,391.72 = 618.05/x
3. Step 3: Cross multiply
   2,261.39x = 3,391.72 × 618.05
4. Step 4: Simplify right side
   2,261.39x = 2,096,259.48
5. Step 5: Solve for x
   x = 2,096,259.48/2,261.39
6. Step 6: Final answer
   x = 926.98