Finding the Fourth Proportional to 1,399.06, 1,925.94 and 1,201.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.06 : 1,925.94 = 1,201.42 : x
2. Step 2: Convert to fraction form
   1,399.06/1,925.94 = 1,201.42/x
3. Step 3: Cross multiply
   1,399.06x = 1,925.94 × 1,201.42
4. Step 4: Simplify right side
   1,399.06x = 2,313,862.83
5. Step 5: Solve for x
   x = 2,313,862.83/1,399.06
6. Step 6: Final answer
   x = 1,653.87