Finding the Fourth Proportional to 3,150.75, 4,726.41 and 842.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,150.75 : 4,726.41 = 842.25 : x
2. Step 2: Convert to fraction form
   3,150.75/4,726.41 = 842.25/x
3. Step 3: Cross multiply
   3,150.75x = 4,726.41 × 842.25
4. Step 4: Simplify right side
   3,150.75x = 3,980,818.82
5. Step 5: Solve for x
   x = 3,980,818.82/3,150.75
6. Step 6: Final answer
   x = 1,263.45