Finding the Fourth Proportional to 2,074.67, 3,111.98 and 842.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.67 : 3,111.98 = 842.09 : x
2. Step 2: Convert to fraction form
   2,074.67/3,111.98 = 842.09/x
3. Step 3: Cross multiply
   2,074.67x = 3,111.98 × 842.09
4. Step 4: Simplify right side
   2,074.67x = 2,620,547.47
5. Step 5: Solve for x
   x = 2,620,547.47/2,074.67
6. Step 6: Final answer
   x = 1,263.12