Finding the Fourth Proportional to 8,129.72, 12,194.30 and 3,446.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,129.72 : 12,194.30 = 3,446.72 : x
2. Step 2: Convert to fraction form
   8,129.72/12,194.30 = 3,446.72/x
3. Step 3: Cross multiply
   8,129.72x = 12,194.30 × 3,446.72
4. Step 4: Simplify right side
   8,129.72x = 42,030,331.07
5. Step 5: Solve for x
   x = 42,030,331.07/8,129.72
6. Step 6: Final answer
   x = 5,169.96