Finding the Fourth Proportional to 2,007.53, 2,771.28 and 1,290.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.53 : 2,771.28 = 1,290.47 : x
2. Step 2: Convert to fraction form
   2,007.53/2,771.28 = 1,290.47/x
3. Step 3: Cross multiply
   2,007.53x = 2,771.28 × 1,290.47
4. Step 4: Simplify right side
   2,007.53x = 3,576,233.39
5. Step 5: Solve for x
   x = 3,576,233.39/2,007.53
6. Step 6: Final answer
   x = 1,781.41