Finding the Fourth Proportional to 1,338.43, 1,847.78 and 919.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.43 : 1,847.78 = 919.03 : x
2. Step 2: Convert to fraction form
   1,338.43/1,847.78 = 919.03/x
3. Step 3: Cross multiply
   1,338.43x = 1,847.78 × 919.03
4. Step 4: Simplify right side
   1,338.43x = 1,698,165.25
5. Step 5: Solve for x
   x = 1,698,165.25/1,338.43
6. Step 6: Final answer
   x = 1,268.77