Finding the Fourth Proportional to 8,074.77, 12,112.28 and 5,319.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,074.77 : 12,112.28 = 5,319.09 : x
2. Step 2: Convert to fraction form
   8,074.77/12,112.28 = 5,319.09/x
3. Step 3: Cross multiply
   8,074.77x = 12,112.28 × 5,319.09
4. Step 4: Simplify right side
   8,074.77x = 64,426,280.83
5. Step 5: Solve for x
   x = 64,426,280.83/8,074.77
6. Step 6: Final answer
   x = 7,978.71