Finding the Fourth Proportional to 2,454.32, 3,681.72 and 810.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,454.32 : 3,681.72 = 810.86 : x
2. Step 2: Convert to fraction form
   2,454.32/3,681.72 = 810.86/x
3. Step 3: Cross multiply
   2,454.32x = 3,681.72 × 810.86
4. Step 4: Simplify right side
   2,454.32x = 2,985,359.48
5. Step 5: Solve for x
   x = 2,985,359.48/2,454.32
6. Step 6: Final answer
   x = 1,216.37