Finding the Fourth Proportional to 1,408.69, 2,111.29 and 627.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.69 : 2,111.29 = 627.60 : x
2. Step 2: Convert to fraction form
   1,408.69/2,111.29 = 627.60/x
3. Step 3: Cross multiply
   1,408.69x = 2,111.29 × 627.60
4. Step 4: Simplify right side
   1,408.69x = 1,325,045.60
5. Step 5: Solve for x
   x = 1,325,045.60/1,408.69
6. Step 6: Final answer
   x = 940.62