Finding the Fourth Proportional to 9,788.06, 13,507.29 and 5,311.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.06 : 13,507.29 = 5,311.62 : x
2. Step 2: Convert to fraction form
   9,788.06/13,507.29 = 5,311.62/x
3. Step 3: Cross multiply
   9,788.06x = 13,507.29 × 5,311.62
4. Step 4: Simplify right side
   9,788.06x = 71,745,591.71
5. Step 5: Solve for x
   x = 71,745,591.71/9,788.06
6. Step 6: Final answer
   x = 7,329.91