Finding the Fourth Proportional to 2,074.74, 3,111.99 and 842.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.74 : 3,111.99 = 842.25 : x
2. Step 2: Convert to fraction form
   2,074.74/3,111.99 = 842.25/x
3. Step 3: Cross multiply
   2,074.74x = 3,111.99 × 842.25
4. Step 4: Simplify right side
   2,074.74x = 2,621,073.58
5. Step 5: Solve for x
   x = 2,621,073.58/2,074.74
6. Step 6: Final answer
   x = 1,263.33