Finding the Fourth Proportional to 8,648.86, 12,974.37 and 3,970.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.86 : 12,974.37 = 3,970.30 : x
2. Step 2: Convert to fraction form
   8,648.86/12,974.37 = 3,970.30/x
3. Step 3: Cross multiply
   8,648.86x = 12,974.37 × 3,970.30
4. Step 4: Simplify right side
   8,648.86x = 51,512,141.21
5. Step 5: Solve for x
   x = 51,512,141.21/8,648.86
6. Step 6: Final answer
   x = 5,955.95