Finding the Fourth Proportional to 3,964.90, 5,474.25 and 3,543.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.90 : 5,474.25 = 3,543.91 : x
2. Step 2: Convert to fraction form
   3,964.90/5,474.25 = 3,543.91/x
3. Step 3: Cross multiply
   3,964.90x = 5,474.25 × 3,543.91
4. Step 4: Simplify right side
   3,964.90x = 19,400,249.32
5. Step 5: Solve for x
   x = 19,400,249.32/3,964.90
6. Step 6: Final answer
   x = 4,893.00