Finding the Fourth Proportional to 8,945.71, 12,345.17 and 4,912.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.71 : 12,345.17 = 4,912.27 : x
2. Step 2: Convert to fraction form
   8,945.71/12,345.17 = 4,912.27/x
3. Step 3: Cross multiply
   8,945.71x = 12,345.17 × 4,912.27
4. Step 4: Simplify right side
   8,945.71x = 60,642,808.24
5. Step 5: Solve for x
   x = 60,642,808.24/8,945.71
6. Step 6: Final answer
   x = 6,778.98