Finding the Fourth Proportional to 5,879.30, 8,113.86 and 3,886.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,879.30 : 8,113.86 = 3,886.40 : x
2. Step 2: Convert to fraction form
   5,879.30/8,113.86 = 3,886.40/x
3. Step 3: Cross multiply
   5,879.30x = 8,113.86 × 3,886.40
4. Step 4: Simplify right side
   5,879.30x = 31,533,705.50
5. Step 5: Solve for x
   x = 31,533,705.50/5,879.30
6. Step 6: Final answer
   x = 5,363.51