Finding the Fourth Proportional to 8,118.78, 12,181.89 and 4,415.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.78 : 12,181.89 = 4,415.46 : x
2. Step 2: Convert to fraction form
   8,118.78/12,181.89 = 4,415.46/x
3. Step 3: Cross multiply
   8,118.78x = 12,181.89 × 4,415.46
4. Step 4: Simplify right side
   8,118.78x = 53,788,687.42
5. Step 5: Solve for x
   x = 53,788,687.42/8,118.78
6. Step 6: Final answer
   x = 6,625.22