Finding the Fourth Proportional to 9,768.45, 13,479.57 and 5,788.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.45 : 13,479.57 = 5,788.92 : x
2. Step 2: Convert to fraction form
   9,768.45/13,479.57 = 5,788.92/x
3. Step 3: Cross multiply
   9,768.45x = 13,479.57 × 5,788.92
4. Step 4: Simplify right side
   9,768.45x = 78,032,152.36
5. Step 5: Solve for x
   x = 78,032,152.36/9,768.45
6. Step 6: Final answer
   x = 7,988.18