Finding the Fourth Proportional to 3,472.72, 5,209.40 and 1,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,472.72 : 5,209.40 = 1,007.80 : x
2. Step 2: Convert to fraction form
   3,472.72/5,209.40 = 1,007.80/x
3. Step 3: Cross multiply
   3,472.72x = 5,209.40 × 1,007.80
4. Step 4: Simplify right side
   3,472.72x = 5,250,033.32
5. Step 5: Solve for x
   x = 5,250,033.32/3,472.72
6. Step 6: Final answer
   x = 1,511.79