Finding the Fourth Proportional to 9,408.35, 12,978.63 and 5,629.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.35 : 12,978.63 = 5,629.70 : x
2. Step 2: Convert to fraction form
   9,408.35/12,978.63 = 5,629.70/x
3. Step 3: Cross multiply
   9,408.35x = 12,978.63 × 5,629.70
4. Step 4: Simplify right side
   9,408.35x = 73,065,825.76
5. Step 5: Solve for x
   x = 73,065,825.76/9,408.35
6. Step 6: Final answer
   x = 7,766.06