Finding the Fourth Proportional to 2,391.18, 3,297.53 and 1,551.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.18 : 3,297.53 = 1,551.57 : x
2. Step 2: Convert to fraction form
   2,391.18/3,297.53 = 1,551.57/x
3. Step 3: Cross multiply
   2,391.18x = 3,297.53 × 1,551.57
4. Step 4: Simplify right side
   2,391.18x = 5,116,340.86
5. Step 5: Solve for x
   x = 5,116,340.86/2,391.18
6. Step 6: Final answer
   x = 2,139.67