Finding the Third Proportional to 713 and 1,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   713 : 1,123.50 = 1,123.50 : x
2. Step 2: Convert to fraction form
   713/1,123.50 = 1,123.50/x
3. Step 3: Cross multiply
   713x = 1,123.50 × 1,123.50
4. Step 4: Simplify right side
   713x = 1,262,252.25
5. Step 5: Solve for x
   x = 1,262,252.25/713
6. Step 6: Final answer
   x = 1,770.34