Finding the Fourth Proportional to 1,399.01, 1,928.48 and 1,025.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.01 : 1,928.48 = 1,025.46 : x
2. Step 2: Convert to fraction form
   1,399.01/1,928.48 = 1,025.46/x
3. Step 3: Cross multiply
   1,399.01x = 1,928.48 × 1,025.46
4. Step 4: Simplify right side
   1,399.01x = 1,977,573.97
5. Step 5: Solve for x
   x = 1,977,573.97/1,399.01
6. Step 6: Final answer
   x = 1,413.56