Finding the Fourth Proportional to 1,443.16, 2,162.70 and 1,117

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.16 : 2,162.70 = 1,117 : x
2. Step 2: Convert to fraction form
   1,443.16/2,162.70 = 1,117/x
3. Step 3: Cross multiply
   1,443.16x = 2,162.70 × 1,117
4. Step 4: Simplify right side
   1,443.16x = 2,415,735.90
5. Step 5: Solve for x
   x = 2,415,735.90/1,443.16
6. Step 6: Final answer
   x = 1,673.92