Finding the Fourth Proportional to 2,116.70, 2,921.55 and 1,454.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.70 : 2,921.55 = 1,454.30 : x
2. Step 2: Convert to fraction form
   2,116.70/2,921.55 = 1,454.30/x
3. Step 3: Cross multiply
   2,116.70x = 2,921.55 × 1,454.30
4. Step 4: Simplify right side
   2,116.70x = 4,248,810.17
5. Step 5: Solve for x
   x = 4,248,810.17/2,116.70
6. Step 6: Final answer
   x = 2,007.28