Finding the Fourth Proportional to 2,454.72, 3,385.80 and 1,667.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,454.72 : 3,385.80 = 1,667.40 : x
2. Step 2: Convert to fraction form
   2,454.72/3,385.80 = 1,667.40/x
3. Step 3: Cross multiply
   2,454.72x = 3,385.80 × 1,667.40
4. Step 4: Simplify right side
   2,454.72x = 5,645,482.92
5. Step 5: Solve for x
   x = 5,645,482.92/2,454.72
6. Step 6: Final answer
   x = 2,299.85