Finding the Fourth Proportional to 9,375.72, 12,939.78 and 5,649

Step by Step Solution

1. Step 1: Write the proportion equation
   9,375.72 : 12,939.78 = 5,649 : x
2. Step 2: Convert to fraction form
   9,375.72/12,939.78 = 5,649/x
3. Step 3: Cross multiply
   9,375.72x = 12,939.78 × 5,649
4. Step 4: Simplify right side
   9,375.72x = 73,096,817.22
5. Step 5: Solve for x
   x = 73,096,817.22/9,375.72
6. Step 6: Final answer
   x = 7,796.40