Finding the Fourth Proportional to 9,768.34, 13,479.50 and 5,519.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.34 : 13,479.50 = 5,519.77 : x
2. Step 2: Convert to fraction form
   9,768.34/13,479.50 = 5,519.77/x
3. Step 3: Cross multiply
   9,768.34x = 13,479.50 × 5,519.77
4. Step 4: Simplify right side
   9,768.34x = 74,403,719.82
5. Step 5: Solve for x
   x = 74,403,719.82/9,768.34
6. Step 6: Final answer
   x = 7,616.83