Finding the Fourth Proportional to 1,551.40, 2,315.69 and 1,454.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.40 : 2,315.69 = 1,454.20 : x
2. Step 2: Convert to fraction form
   1,551.40/2,315.69 = 1,454.20/x
3. Step 3: Cross multiply
   1,551.40x = 2,315.69 × 1,454.20
4. Step 4: Simplify right side
   1,551.40x = 3,367,476.40
5. Step 5: Solve for x
   x = 3,367,476.40/1,551.40
6. Step 6: Final answer
   x = 2,170.60