Finding the Fourth Proportional to 9,348.40, 12,900.52 and 5,368.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,348.40 : 12,900.52 = 5,368.80 : x
2. Step 2: Convert to fraction form
   9,348.40/12,900.52 = 5,368.80/x
3. Step 3: Cross multiply
   9,348.40x = 12,900.52 × 5,368.80
4. Step 4: Simplify right side
   9,348.40x = 69,260,311.78
5. Step 5: Solve for x
   x = 69,260,311.78/9,348.40
6. Step 6: Final answer
   x = 7,408.79