Finding the Fourth Proportional to 3,874.79, 5,807.55 and 1,791.95

Step by Step Solution

1. Step 1: Write the proportion equation
   3,874.79 : 5,807.55 = 1,791.95 : x
2. Step 2: Convert to fraction form
   3,874.79/5,807.55 = 1,791.95/x
3. Step 3: Cross multiply
   3,874.79x = 5,807.55 × 1,791.95
4. Step 4: Simplify right side
   3,874.79x = 10,406,839.22
5. Step 5: Solve for x
   x = 10,406,839.22/3,874.79
6. Step 6: Final answer
   x = 2,685.78