Finding the Fourth Proportional to 5,891.61, 8,124.84 and 3,871.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,891.61 : 8,124.84 = 3,871.47 : x
2. Step 2: Convert to fraction form
   5,891.61/8,124.84 = 3,871.47/x
3. Step 3: Cross multiply
   5,891.61x = 8,124.84 × 3,871.47
4. Step 4: Simplify right side
   5,891.61x = 31,455,104.78
5. Step 5: Solve for x
   x = 31,455,104.78/5,891.61
6. Step 6: Final answer
   x = 5,338.96