Finding the Fourth Proportional to 8,939.72, 12,341.72 and 6,111.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,939.72 : 12,341.72 = 6,111.36 : x
2. Step 2: Convert to fraction form
   8,939.72/12,341.72 = 6,111.36/x
3. Step 3: Cross multiply
   8,939.72x = 12,341.72 × 6,111.36
4. Step 4: Simplify right side
   8,939.72x = 75,424,693.94
5. Step 5: Solve for x
   x = 75,424,693.94/8,939.72
6. Step 6: Final answer
   x = 8,437.03