Finding the Fourth Proportional to 1,513.56, 2,271.15 and 1,403.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.56 : 2,271.15 = 1,403.40 : x
2. Step 2: Convert to fraction form
   1,513.56/2,271.15 = 1,403.40/x
3. Step 3: Cross multiply
   1,513.56x = 2,271.15 × 1,403.40
4. Step 4: Simplify right side
   1,513.56x = 3,187,331.91
5. Step 5: Solve for x
   x = 3,187,331.91/1,513.56
6. Step 6: Final answer
   x = 2,105.85