Finding the Fourth Proportional to 7,878.25, 10,872.12 and 5,088.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,878.25 : 10,872.12 = 5,088.61 : x
2. Step 2: Convert to fraction form
   7,878.25/10,872.12 = 5,088.61/x
3. Step 3: Cross multiply
   7,878.25x = 10,872.12 × 5,088.61
4. Step 4: Simplify right side
   7,878.25x = 55,323,978.55
5. Step 5: Solve for x
   x = 55,323,978.55/7,878.25
6. Step 6: Final answer
   x = 7,022.37