Finding the Fourth Proportional to 3,147.98, 4,724.04 and 1,200.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,147.98 : 4,724.04 = 1,200.20 : x
2. Step 2: Convert to fraction form
   3,147.98/4,724.04 = 1,200.20/x
3. Step 3: Cross multiply
   3,147.98x = 4,724.04 × 1,200.20
4. Step 4: Simplify right side
   3,147.98x = 5,669,792.81
5. Step 5: Solve for x
   x = 5,669,792.81/3,147.98
6. Step 6: Final answer
   x = 1,801.09