Finding the Fourth Proportional to 5,168.65, 7,132.76 and 2,810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,168.65 : 7,132.76 = 2,810.78 : x
2. Step 2: Convert to fraction form
   5,168.65/7,132.76 = 2,810.78/x
3. Step 3: Cross multiply
   5,168.65x = 7,132.76 × 2,810.78
4. Step 4: Simplify right side
   5,168.65x = 20,048,619.15
5. Step 5: Solve for x
   x = 20,048,619.15/5,168.65
6. Step 6: Final answer
   x = 3,878.89