Finding the Fourth Proportional to 1,382.67, 1,909.98 and 1,120.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.67 : 1,909.98 = 1,120.23 : x
2. Step 2: Convert to fraction form
   1,382.67/1,909.98 = 1,120.23/x
3. Step 3: Cross multiply
   1,382.67x = 1,909.98 × 1,120.23
4. Step 4: Simplify right side
   1,382.67x = 2,139,616.90
5. Step 5: Solve for x
   x = 2,139,616.90/1,382.67
6. Step 6: Final answer
   x = 1,547.45