Finding the Fourth Proportional to 8,272.72, 12,412.32 and 3,079

Step by Step Solution

1. Step 1: Write the proportion equation
   8,272.72 : 12,412.32 = 3,079 : x
2. Step 2: Convert to fraction form
   8,272.72/12,412.32 = 3,079/x
3. Step 3: Cross multiply
   8,272.72x = 12,412.32 × 3,079
4. Step 4: Simplify right side
   8,272.72x = 38,217,533.28
5. Step 5: Solve for x
   x = 38,217,533.28/8,272.72
6. Step 6: Final answer
   x = 4,619.71