Finding the Fourth Proportional to 2,278.86, 3,417.31 and 718.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.86 : 3,417.31 = 718.48 : x
2. Step 2: Convert to fraction form
   2,278.86/3,417.31 = 718.48/x
3. Step 3: Cross multiply
   2,278.86x = 3,417.31 × 718.48
4. Step 4: Simplify right side
   2,278.86x = 2,455,268.89
5. Step 5: Solve for x
   x = 2,455,268.89/2,278.86
6. Step 6: Final answer
   x = 1,077.41