Finding the Fourth Proportional to 6,442.17, 9,669.50 and 3,112.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,442.17 : 9,669.50 = 3,112.76 : x
2. Step 2: Convert to fraction form
   6,442.17/9,669.50 = 3,112.76/x
3. Step 3: Cross multiply
   6,442.17x = 9,669.50 × 3,112.76
4. Step 4: Simplify right side
   6,442.17x = 30,098,768.91
5. Step 5: Solve for x
   x = 30,098,768.91/6,442.17
6. Step 6: Final answer
   x = 4,672.15