Finding the Fourth Proportional to 1,378.56, 1,900.20 and 1,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.56 : 1,900.20 = 1,062.72 : x
2. Step 2: Convert to fraction form
   1,378.56/1,900.20 = 1,062.72/x
3. Step 3: Cross multiply
   1,378.56x = 1,900.20 × 1,062.72
4. Step 4: Simplify right side
   1,378.56x = 2,019,380.54
5. Step 5: Solve for x
   x = 2,019,380.54/1,378.56
6. Step 6: Final answer
   x = 1,464.85