Finding the Fourth Proportional to 2,073.40, 3,109.22 and 839.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.40 : 3,109.22 = 839.94 : x
2. Step 2: Convert to fraction form
   2,073.40/3,109.22 = 839.94/x
3. Step 3: Cross multiply
   2,073.40x = 3,109.22 × 839.94
4. Step 4: Simplify right side
   2,073.40x = 2,611,575.31
5. Step 5: Solve for x
   x = 2,611,575.31/2,073.40
6. Step 6: Final answer
   x = 1,259.56