Finding the Third Proportional to 516 and 1,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   516 : 1,112.72 = 1,112.72 : x
2. Step 2: Convert to fraction form
   516/1,112.72 = 1,112.72/x
3. Step 3: Cross multiply
   516x = 1,112.72 × 1,112.72
4. Step 4: Simplify right side
   516x = 1,238,143.02
5. Step 5: Solve for x
   x = 1,238,143.02/516
6. Step 6: Final answer
   x = 2,399.50