Finding the Fourth Proportional to 9,942.57, 13,720.72 and 5,466.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,942.57 : 13,720.72 = 5,466.31 : x
2. Step 2: Convert to fraction form
   9,942.57/13,720.72 = 5,466.31/x
3. Step 3: Cross multiply
   9,942.57x = 13,720.72 × 5,466.31
4. Step 4: Simplify right side
   9,942.57x = 75,001,694.44
5. Step 5: Solve for x
   x = 75,001,694.44/9,942.57
6. Step 6: Final answer
   x = 7,543.49