Finding the Fourth Proportional to 9,431.25, 13,016.71 and 5,454.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,431.25 : 13,016.71 = 5,454.78 : x
2. Step 2: Convert to fraction form
   9,431.25/13,016.71 = 5,454.78/x
3. Step 3: Cross multiply
   9,431.25x = 13,016.71 × 5,454.78
4. Step 4: Simplify right side
   9,431.25x = 71,003,289.37
5. Step 5: Solve for x
   x = 71,003,289.37/9,431.25
6. Step 6: Final answer
   x = 7,528.51