Finding the Fourth Proportional to 2,231.20, 3,079.17 and 1,236.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.20 : 3,079.17 = 1,236.59 : x
2. Step 2: Convert to fraction form
   2,231.20/3,079.17 = 1,236.59/x
3. Step 3: Cross multiply
   2,231.20x = 3,079.17 × 1,236.59
4. Step 4: Simplify right side
   2,231.20x = 3,807,649.25
5. Step 5: Solve for x
   x = 3,807,649.25/2,231.20
6. Step 6: Final answer
   x = 1,706.55