Finding the Fourth Proportional to 8,172.24, 12,256.72 and 3,490.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,172.24 : 12,256.72 = 3,490.84 : x
2. Step 2: Convert to fraction form
   8,172.24/12,256.72 = 3,490.84/x
3. Step 3: Cross multiply
   8,172.24x = 12,256.72 × 3,490.84
4. Step 4: Simplify right side
   8,172.24x = 42,786,248.44
5. Step 5: Solve for x
   x = 42,786,248.44/8,172.24
6. Step 6: Final answer
   x = 5,235.56