Finding the Third Proportional to 56,709 and 123,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,709 : 123,781.50 = 123,781.50 : x
2. Step 2: Convert to fraction form
   56,709/123,781.50 = 123,781.50/x
3. Step 3: Cross multiply
   56,709x = 123,781.50 × 123,781.50
4. Step 4: Simplify right side
   56,709x = 15,321,859,742.25
5. Step 5: Solve for x
   x = 15,321,859,742.25/56,709
6. Step 6: Final answer
   x = 270,183.92