Finding the Fourth Proportional to 5,889.32, 8,128.41 and 3,899.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,889.32 : 8,128.41 = 3,899.96 : x
2. Step 2: Convert to fraction form
   5,889.32/8,128.41 = 3,899.96/x
3. Step 3: Cross multiply
   5,889.32x = 8,128.41 × 3,899.96
4. Step 4: Simplify right side
   5,889.32x = 31,700,473.86
5. Step 5: Solve for x
   x = 31,700,473.86/5,889.32
6. Step 6: Final answer
   x = 5,382.71