Finding the Third Proportional to 56,699.25 and 123,759.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,699.25 : 123,759.75 = 123,759.75 : x
2. Step 2: Convert to fraction form
   56,699.25/123,759.75 = 123,759.75/x
3. Step 3: Cross multiply
   56,699.25x = 123,759.75 × 123,759.75
4. Step 4: Simplify right side
   56,699.25x = 15,316,475,720.06
5. Step 5: Solve for x
   x = 15,316,475,720.06/56,699.25
6. Step 6: Final answer
   x = 270,135.42