Finding the Fourth Proportional to 1,212.92, 1,817.69 and 1,066.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212.92 : 1,817.69 = 1,066.31 : x
2. Step 2: Convert to fraction form
   1,212.92/1,817.69 = 1,066.31/x
3. Step 3: Cross multiply
   1,212.92x = 1,817.69 × 1,066.31
4. Step 4: Simplify right side
   1,212.92x = 1,938,229.64
5. Step 5: Solve for x
   x = 1,938,229.64/1,212.92
6. Step 6: Final answer
   x = 1,597.98