Finding the Fourth Proportional to 1,338.72, 2,002.60 and 849.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.72 : 2,002.60 = 849.37 : x
2. Step 2: Convert to fraction form
   1,338.72/2,002.60 = 849.37/x
3. Step 3: Cross multiply
   1,338.72x = 2,002.60 × 849.37
4. Step 4: Simplify right side
   1,338.72x = 1,700,948.36
5. Step 5: Solve for x
   x = 1,700,948.36/1,338.72
6. Step 6: Final answer
   x = 1,270.58