Finding the Fourth Proportional to 1,321.56, 1,822.83 and 1,072.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.56 : 1,822.83 = 1,072.88 : x
2. Step 2: Convert to fraction form
   1,321.56/1,822.83 = 1,072.88/x
3. Step 3: Cross multiply
   1,321.56x = 1,822.83 × 1,072.88
4. Step 4: Simplify right side
   1,321.56x = 1,955,677.85
5. Step 5: Solve for x
   x = 1,955,677.85/1,321.56
6. Step 6: Final answer
   x = 1,479.83