Finding the Fourth Proportional to 1,100.67, 1,643.16 and 1,062.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.67 : 1,643.16 = 1,062.21 : x
2. Step 2: Convert to fraction form
   1,100.67/1,643.16 = 1,062.21/x
3. Step 3: Cross multiply
   1,100.67x = 1,643.16 × 1,062.21
4. Step 4: Simplify right side
   1,100.67x = 1,745,380.98
5. Step 5: Solve for x
   x = 1,745,380.98/1,100.67
6. Step 6: Final answer
   x = 1,585.74