Finding the Fourth Proportional to 2,643.31, 3,963.56 and 793.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.31 : 3,963.56 = 793.93 : x
2. Step 2: Convert to fraction form
   2,643.31/3,963.56 = 793.93/x
3. Step 3: Cross multiply
   2,643.31x = 3,963.56 × 793.93
4. Step 4: Simplify right side
   2,643.31x = 3,146,773.83
5. Step 5: Solve for x
   x = 3,146,773.83/2,643.31
6. Step 6: Final answer
   x = 1,190.47