Finding the Third Proportional to 77,987 and 123,983

Step by Step Solution

1. Step 1: Write the proportion equation
   77,987 : 123,983 = 123,983 : x
2. Step 2: Convert to fraction form
   77,987/123,983 = 123,983/x
3. Step 3: Cross multiply
   77,987x = 123,983 × 123,983
4. Step 4: Simplify right side
   77,987x = 15,371,784,289
5. Step 5: Solve for x
   x = 15,371,784,289/77,987
6. Step 6: Final answer
   x = 197,107.01