Finding the Fourth Proportional to 5,680.80, 8,510.04 and 5,061.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,680.80 : 8,510.04 = 5,061.60 : x
2. Step 2: Convert to fraction form
   5,680.80/8,510.04 = 5,061.60/x
3. Step 3: Cross multiply
   5,680.80x = 8,510.04 × 5,061.60
4. Step 4: Simplify right side
   5,680.80x = 43,074,418.46
5. Step 5: Solve for x
   x = 43,074,418.46/5,680.80
6. Step 6: Final answer
   x = 7,582.46