Finding the Fourth Proportional to 9,383.75, 12,946.43 and 5,404.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,383.75 : 12,946.43 = 5,404.78 : x
2. Step 2: Convert to fraction form
   9,383.75/12,946.43 = 5,404.78/x
3. Step 3: Cross multiply
   9,383.75x = 12,946.43 × 5,404.78
4. Step 4: Simplify right side
   9,383.75x = 69,972,546.55
5. Step 5: Solve for x
   x = 69,972,546.55/9,383.75
6. Step 6: Final answer
   x = 7,456.78