Finding the Fourth Proportional to 1,394.32, 1,926.72 and 1,000.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.32 : 1,926.72 = 1,000.72 : x
2. Step 2: Convert to fraction form
   1,394.32/1,926.72 = 1,000.72/x
3. Step 3: Cross multiply
   1,394.32x = 1,926.72 × 1,000.72
4. Step 4: Simplify right side
   1,394.32x = 1,928,107.24
5. Step 5: Solve for x
   x = 1,928,107.24/1,394.32
6. Step 6: Final answer
   x = 1,382.83