Finding the Fourth Proportional to 1,399.77, 2,087.46 and 1,227.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.77 : 2,087.46 = 1,227.24 : x
2. Step 2: Convert to fraction form
   1,399.77/2,087.46 = 1,227.24/x
3. Step 3: Cross multiply
   1,399.77x = 2,087.46 × 1,227.24
4. Step 4: Simplify right side
   1,399.77x = 2,561,814.41
5. Step 5: Solve for x
   x = 2,561,814.41/1,399.77
6. Step 6: Final answer
   x = 1,830.17