Finding the Fourth Proportional to 9,768.09, 13,479.98 and 5,291.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.09 : 13,479.98 = 5,291.88 : x
2. Step 2: Convert to fraction form
   9,768.09/13,479.98 = 5,291.88/x
3. Step 3: Cross multiply
   9,768.09x = 13,479.98 × 5,291.88
4. Step 4: Simplify right side
   9,768.09x = 71,334,359.55
5. Step 5: Solve for x
   x = 71,334,359.55/9,768.09
6. Step 6: Final answer
   x = 7,302.79