Finding the Fourth Proportional to 8,178.86, 11,298.22 and 7,875.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,178.86 : 11,298.22 = 7,875.42 : x
2. Step 2: Convert to fraction form
   8,178.86/11,298.22 = 7,875.42/x
3. Step 3: Cross multiply
   8,178.86x = 11,298.22 × 7,875.42
4. Step 4: Simplify right side
   8,178.86x = 88,978,227.75
5. Step 5: Solve for x
   x = 88,978,227.75/8,178.86
6. Step 6: Final answer
   x = 10,879.05