Finding the Fourth Proportional to 8,185.91, 12,278.78 and 4,899.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,185.91 : 12,278.78 = 4,899.92 : x
2. Step 2: Convert to fraction form
   8,185.91/12,278.78 = 4,899.92/x
3. Step 3: Cross multiply
   8,185.91x = 12,278.78 × 4,899.92
4. Step 4: Simplify right side
   8,185.91x = 60,165,015.20
5. Step 5: Solve for x
   x = 60,165,015.20/8,185.91
6. Step 6: Final answer
   x = 7,349.83