Finding the Fourth Proportional to 2,454.72, 3,679.62 and 893.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,454.72 : 3,679.62 = 893.40 : x
2. Step 2: Convert to fraction form
   2,454.72/3,679.62 = 893.40/x
3. Step 3: Cross multiply
   2,454.72x = 3,679.62 × 893.40
4. Step 4: Simplify right side
   2,454.72x = 3,287,372.51
5. Step 5: Solve for x
   x = 3,287,372.51/2,454.72
6. Step 6: Final answer
   x = 1,339.20