Finding the Third Proportional to 78,000 and 123,987

Step by Step Solution

1. Step 1: Write the proportion equation
   78,000 : 123,987 = 123,987 : x
2. Step 2: Convert to fraction form
   78,000/123,987 = 123,987/x
3. Step 3: Cross multiply
   78,000x = 123,987 × 123,987
4. Step 4: Simplify right side
   78,000x = 15,372,776,169
5. Step 5: Solve for x
   x = 15,372,776,169/78,000
6. Step 6: Final answer
   x = 197,086.87