Finding the Fourth Proportional to 5,168.81, 7,132.96 and 2,811.00

Step by Step Solution

1. Step 1: Write the proportion equation
   5,168.81 : 7,132.96 = 2,811.00 : x
2. Step 2: Convert to fraction form
   5,168.81/7,132.96 = 2,811.00/x
3. Step 3: Cross multiply
   5,168.81x = 7,132.96 × 2,811.00
4. Step 4: Simplify right side
   5,168.81x = 20,050,780.82
5. Step 5: Solve for x
   x = 20,050,780.82/5,168.81
6. Step 6: Final answer
   x = 3,879.19