Finding the Fourth Proportional to 9,528.78, 13,145.55 and 5,749.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,528.78 : 13,145.55 = 5,749.80 : x
2. Step 2: Convert to fraction form
   9,528.78/13,145.55 = 5,749.80/x
3. Step 3: Cross multiply
   9,528.78x = 13,145.55 × 5,749.80
4. Step 4: Simplify right side
   9,528.78x = 75,584,283.39
5. Step 5: Solve for x
   x = 75,584,283.39/9,528.78
6. Step 6: Final answer
   x = 7,932.21