Finding the Fourth Proportional to 5,877.60, 8,120.34 and 5,411.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,877.60 : 8,120.34 = 5,411.04 : x
2. Step 2: Convert to fraction form
   5,877.60/8,120.34 = 5,411.04/x
3. Step 3: Cross multiply
   5,877.60x = 8,120.34 × 5,411.04
4. Step 4: Simplify right side
   5,877.60x = 43,939,484.55
5. Step 5: Solve for x
   x = 43,939,484.55/5,877.60
6. Step 6: Final answer
   x = 7,475.75