Finding the Fourth Proportional to 1,143.50, 1,718.89 and 713.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.50 : 1,718.89 = 713.39 : x
2. Step 2: Convert to fraction form
   1,143.50/1,718.89 = 713.39/x
3. Step 3: Cross multiply
   1,143.50x = 1,718.89 × 713.39
4. Step 4: Simplify right side
   1,143.50x = 1,226,228.56
5. Step 5: Solve for x
   x = 1,226,228.56/1,143.50
6. Step 6: Final answer
   x = 1,072.35