Finding the Fourth Proportional to 3,640.10, 5,459.73 and 1,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,640.10 : 5,459.73 = 1,007.80 : x
2. Step 2: Convert to fraction form
   3,640.10/5,459.73 = 1,007.80/x
3. Step 3: Cross multiply
   3,640.10x = 5,459.73 × 1,007.80
4. Step 4: Simplify right side
   3,640.10x = 5,502,315.89
5. Step 5: Solve for x
   x = 5,502,315.89/3,640.10
6. Step 6: Final answer
   x = 1,511.58