Finding the Fourth Proportional to 1,513.78, 2,259.56 and 1,408.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.78 : 2,259.56 = 1,408.03 : x
2. Step 2: Convert to fraction form
   1,513.78/2,259.56 = 1,408.03/x
3. Step 3: Cross multiply
   1,513.78x = 2,259.56 × 1,408.03
4. Step 4: Simplify right side
   1,513.78x = 3,181,532.91
5. Step 5: Solve for x
   x = 3,181,532.91/1,513.78
6. Step 6: Final answer
   x = 2,101.72