Finding the Fourth Proportional to 9,751.31, 13,456.28 and 5,772.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,751.31 : 13,456.28 = 5,772.79 : x
2. Step 2: Convert to fraction form
   9,751.31/13,456.28 = 5,772.79/x
3. Step 3: Cross multiply
   9,751.31x = 13,456.28 × 5,772.79
4. Step 4: Simplify right side
   9,751.31x = 77,680,182.48
5. Step 5: Solve for x
   x = 77,680,182.48/9,751.31
6. Step 6: Final answer
   x = 7,966.13