Finding the Fourth Proportional to 2,238.72, 3,355.56 and 1,006.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.72 : 3,355.56 = 1,006.80 : x
2. Step 2: Convert to fraction form
   2,238.72/3,355.56 = 1,006.80/x
3. Step 3: Cross multiply
   2,238.72x = 3,355.56 × 1,006.80
4. Step 4: Simplify right side
   2,238.72x = 3,378,377.81
5. Step 5: Solve for x
   x = 3,378,377.81/2,238.72
6. Step 6: Final answer
   x = 1,509.07