Finding the Fourth Proportional to 1,109.21, 1,662.51 and 834.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.21 : 1,662.51 = 834.41 : x
2. Step 2: Convert to fraction form
   1,109.21/1,662.51 = 834.41/x
3. Step 3: Cross multiply
   1,109.21x = 1,662.51 × 834.41
4. Step 4: Simplify right side
   1,109.21x = 1,387,222.25
5. Step 5: Solve for x
   x = 1,387,222.25/1,109.21
6. Step 6: Final answer
   x = 1,250.65