Finding the Fourth Proportional to 9,605.79, 13,256.60 and 5,414.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,605.79 : 13,256.60 = 5,414.31 : x
2. Step 2: Convert to fraction form
   9,605.79/13,256.60 = 5,414.31/x
3. Step 3: Cross multiply
   9,605.79x = 13,256.60 × 5,414.31
4. Step 4: Simplify right side
   9,605.79x = 71,775,314.87
5. Step 5: Solve for x
   x = 71,775,314.87/9,605.79
6. Step 6: Final answer
   x = 7,472.09