Finding the Third Proportional to 56,890.69 and 123,810.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,890.69 : 123,810.75 = 123,810.75 : x
2. Step 2: Convert to fraction form
   56,890.69/123,810.75 = 123,810.75/x
3. Step 3: Cross multiply
   56,890.69x = 123,810.75 × 123,810.75
4. Step 4: Simplify right side
   56,890.69x = 15,329,101,815.56
5. Step 5: Solve for x
   x = 15,329,101,815.56/56,890.69
6. Step 6: Final answer
   x = 269,448.35