Finding the Fourth Proportional to 9,764.16, 13,474.56 and 5,287.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,764.16 : 13,474.56 = 5,287.87 : x
2. Step 2: Convert to fraction form
   9,764.16/13,474.56 = 5,287.87/x
3. Step 3: Cross multiply
   9,764.16x = 13,474.56 × 5,287.87
4. Step 4: Simplify right side
   9,764.16x = 71,251,721.59
5. Step 5: Solve for x
   x = 71,251,721.59/9,764.16
6. Step 6: Final answer
   x = 7,297.27