Finding the Fourth Proportional to 6,510.77, 8,978.15 and 5,569.68

Step by Step Solution

1. Step 1: Write the proportion equation
   6,510.77 : 8,978.15 = 5,569.68 : x
2. Step 2: Convert to fraction form
   6,510.77/8,978.15 = 5,569.68/x
3. Step 3: Cross multiply
   6,510.77x = 8,978.15 × 5,569.68
4. Step 4: Simplify right side
   6,510.77x = 50,005,394.64
5. Step 5: Solve for x
   x = 50,005,394.64/6,510.77
6. Step 6: Final answer
   x = 7,680.42