Finding the Fourth Proportional to 8,151.68, 12,218.69 and 3,994.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,151.68 : 12,218.69 = 3,994.50 : x
2. Step 2: Convert to fraction form
   8,151.68/12,218.69 = 3,994.50/x
3. Step 3: Cross multiply
   8,151.68x = 12,218.69 × 3,994.50
4. Step 4: Simplify right side
   8,151.68x = 48,807,557.21
5. Step 5: Solve for x
   x = 48,807,557.21/8,151.68
6. Step 6: Final answer
   x = 5,987.42