Finding the Fourth Proportional to 2,439.59, 3,365.79 and 1,377.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.59 : 3,365.79 = 1,377.22 : x
2. Step 2: Convert to fraction form
   2,439.59/3,365.79 = 1,377.22/x
3. Step 3: Cross multiply
   2,439.59x = 3,365.79 × 1,377.22
4. Step 4: Simplify right side
   2,439.59x = 4,635,419.72
5. Step 5: Solve for x
   x = 4,635,419.72/2,439.59
6. Step 6: Final answer
   x = 1,900.09