Finding the Fourth Proportional to 12,773.20, 19,149.72 and 5,378.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,773.20 : 19,149.72 = 5,378.80 : x
2. Step 2: Convert to fraction form
   12,773.20/19,149.72 = 5,378.80/x
3. Step 3: Cross multiply
   12,773.20x = 19,149.72 × 5,378.80
4. Step 4: Simplify right side
   12,773.20x = 103,002,513.94
5. Step 5: Solve for x
   x = 103,002,513.94/12,773.20
6. Step 6: Final answer
   x = 8,063.96