Finding the Fourth Proportional to 1,715.18, 2,367.15 and 1,016.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.18 : 2,367.15 = 1,016.78 : x
2. Step 2: Convert to fraction form
   1,715.18/2,367.15 = 1,016.78/x
3. Step 3: Cross multiply
   1,715.18x = 2,367.15 × 1,016.78
4. Step 4: Simplify right side
   1,715.18x = 2,406,870.78
5. Step 5: Solve for x
   x = 2,406,870.78/1,715.18
6. Step 6: Final answer
   x = 1,403.28