Finding the Fourth Proportional to 1,399.49, 2,090.28 and 1,267.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.49 : 2,090.28 = 1,267.52 : x
2. Step 2: Convert to fraction form
   1,399.49/2,090.28 = 1,267.52/x
3. Step 3: Cross multiply
   1,399.49x = 2,090.28 × 1,267.52
4. Step 4: Simplify right side
   1,399.49x = 2,649,471.71
5. Step 5: Solve for x
   x = 2,649,471.71/1,399.49
6. Step 6: Final answer
   x = 1,893.17