Finding the Fourth Proportional to 1,628.16, 2,250.72 and 1,394.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.16 : 2,250.72 = 1,394.88 : x
2. Step 2: Convert to fraction form
   1,628.16/2,250.72 = 1,394.88/x
3. Step 3: Cross multiply
   1,628.16x = 2,250.72 × 1,394.88
4. Step 4: Simplify right side
   1,628.16x = 3,139,484.31
5. Step 5: Solve for x
   x = 3,139,484.31/1,628.16
6. Step 6: Final answer
   x = 1,928.24