Finding the Fourth Proportional to 8,446.86, 12,656.61 and 5,149.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,446.86 : 12,656.61 = 5,149.98 : x
2. Step 2: Convert to fraction form
   8,446.86/12,656.61 = 5,149.98/x
3. Step 3: Cross multiply
   8,446.86x = 12,656.61 × 5,149.98
4. Step 4: Simplify right side
   8,446.86x = 65,181,288.37
5. Step 5: Solve for x
   x = 65,181,288.37/8,446.86
6. Step 6: Final answer
   x = 7,716.63