Finding the Fourth Proportional to 1,647.32, 2,271.98 and 1,399.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.32 : 2,271.98 = 1,399.46 : x
2. Step 2: Convert to fraction form
   1,647.32/2,271.98 = 1,399.46/x
3. Step 3: Cross multiply
   1,647.32x = 2,271.98 × 1,399.46
4. Step 4: Simplify right side
   1,647.32x = 3,179,533.77
5. Step 5: Solve for x
   x = 3,179,533.77/1,647.32
6. Step 6: Final answer
   x = 1,930.13