Finding the Fourth Proportional to 9,307.72, 12,839.84 and 5,764.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,307.72 : 12,839.84 = 5,764.78 : x
2. Step 2: Convert to fraction form
   9,307.72/12,839.84 = 5,764.78/x
3. Step 3: Cross multiply
   9,307.72x = 12,839.84 × 5,764.78
4. Step 4: Simplify right side
   9,307.72x = 74,018,791.91
5. Step 5: Solve for x
   x = 74,018,791.91/9,307.72
6. Step 6: Final answer
   x = 7,952.41