Finding the Fourth Proportional to 7,875.86, 10,872.28 and 5,608.66

Step by Step Solution

1. Step 1: Write the proportion equation
   7,875.86 : 10,872.28 = 5,608.66 : x
2. Step 2: Convert to fraction form
   7,875.86/10,872.28 = 5,608.66/x
3. Step 3: Cross multiply
   7,875.86x = 10,872.28 × 5,608.66
4. Step 4: Simplify right side
   7,875.86x = 60,978,921.94
5. Step 5: Solve for x
   x = 60,978,921.94/7,875.86
6. Step 6: Final answer
   x = 7,742.51