Finding the Fourth Proportional to 1,372.56, 1,891.90 and 1,073.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.56 : 1,891.90 = 1,073.28 : x
2. Step 2: Convert to fraction form
   1,372.56/1,891.90 = 1,073.28/x
3. Step 3: Cross multiply
   1,372.56x = 1,891.90 × 1,073.28
4. Step 4: Simplify right side
   1,372.56x = 2,030,538.43
5. Step 5: Solve for x
   x = 2,030,538.43/1,372.56
6. Step 6: Final answer
   x = 1,479.38