Finding the Fourth Proportional to 9,770.28, 13,477.44 and 5,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,770.28 : 13,477.44 = 5,790.72 : x
2. Step 2: Convert to fraction form
   9,770.28/13,477.44 = 5,790.72/x
3. Step 3: Cross multiply
   9,770.28x = 13,477.44 × 5,790.72
4. Step 4: Simplify right side
   9,770.28x = 78,044,081.36
5. Step 5: Solve for x
   x = 78,044,081.36/9,770.28
6. Step 6: Final answer
   x = 7,987.91