Finding the Third Proportional to 767.81 and 1,124.72

Step by Step Solution

1. Step 1: Write the proportion equation
   767.81 : 1,124.72 = 1,124.72 : x
2. Step 2: Convert to fraction form
   767.81/1,124.72 = 1,124.72/x
3. Step 3: Cross multiply
   767.81x = 1,124.72 × 1,124.72
4. Step 4: Simplify right side
   767.81x = 1,264,992.27
5. Step 5: Solve for x
   x = 1,264,992.27/767.81
6. Step 6: Final answer
   x = 1,647.53