Finding the Fourth Proportional to 2,573.32, 3,860.18 and 842.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.32 : 3,860.18 = 842.12 : x
2. Step 2: Convert to fraction form
   2,573.32/3,860.18 = 842.12/x
3. Step 3: Cross multiply
   2,573.32x = 3,860.18 × 842.12
4. Step 4: Simplify right side
   2,573.32x = 3,250,734.78
5. Step 5: Solve for x
   x = 3,250,734.78/2,573.32
6. Step 6: Final answer
   x = 1,263.25