Finding the Fourth Proportional to 1,513.24, 2,085.15 and 1,217.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.24 : 2,085.15 = 1,217.32 : x
2. Step 2: Convert to fraction form
   1,513.24/2,085.15 = 1,217.32/x
3. Step 3: Cross multiply
   1,513.24x = 2,085.15 × 1,217.32
4. Step 4: Simplify right side
   1,513.24x = 2,538,294.80
5. Step 5: Solve for x
   x = 2,538,294.80/1,513.24
6. Step 6: Final answer
   x = 1,677.39