Finding the Fourth Proportional to 12,778.62, 19,175.31 and 5,382.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.62 : 19,175.31 = 5,382.60 : x
2. Step 2: Convert to fraction form
   12,778.62/19,175.31 = 5,382.60/x
3. Step 3: Cross multiply
   12,778.62x = 19,175.31 × 5,382.60
4. Step 4: Simplify right side
   12,778.62x = 103,213,023.61
5. Step 5: Solve for x
   x = 103,213,023.61/12,778.62
6. Step 6: Final answer
   x = 8,077.01