Finding the Fourth Proportional to 8,312.23, 12,472.40 and 3,385.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,312.23 : 12,472.40 = 3,385.27 : x
2. Step 2: Convert to fraction form
   8,312.23/12,472.40 = 3,385.27/x
3. Step 3: Cross multiply
   8,312.23x = 12,472.40 × 3,385.27
4. Step 4: Simplify right side
   8,312.23x = 42,222,441.55
5. Step 5: Solve for x
   x = 42,222,441.55/8,312.23
6. Step 6: Final answer
   x = 5,079.56