Finding the Fourth Proportional to 6,111.38, 9,171.67 and 4,472.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.38 : 9,171.67 = 4,472.15 : x
2. Step 2: Convert to fraction form
   6,111.38/9,171.67 = 4,472.15/x
3. Step 3: Cross multiply
   6,111.38x = 9,171.67 × 4,472.15
4. Step 4: Simplify right side
   6,111.38x = 41,017,026.95
5. Step 5: Solve for x
   x = 41,017,026.95/6,111.38
6. Step 6: Final answer
   x = 6,711.59