Finding the Fourth Proportional to 9,208.35, 12,711.78 and 5,430.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,208.35 : 12,711.78 = 5,430.24 : x
2. Step 2: Convert to fraction form
   9,208.35/12,711.78 = 5,430.24/x
3. Step 3: Cross multiply
   9,208.35x = 12,711.78 × 5,430.24
4. Step 4: Simplify right side
   9,208.35x = 69,028,016.23
5. Step 5: Solve for x
   x = 69,028,016.23/9,208.35
6. Step 6: Final answer
   x = 7,496.24