Finding the Fourth Proportional to 2,140.80, 3,209.82 and 892.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.80 : 3,209.82 = 892.25 : x
2. Step 2: Convert to fraction form
   2,140.80/3,209.82 = 892.25/x
3. Step 3: Cross multiply
   2,140.80x = 3,209.82 × 892.25
4. Step 4: Simplify right side
   2,140.80x = 2,863,961.90
5. Step 5: Solve for x
   x = 2,863,961.90/2,140.80
6. Step 6: Final answer
   x = 1,337.80