Finding the Third Proportional to 128,987 and 185,789

Step by Step Solution

1. Step 1: Write the proportion equation
   128,987 : 185,789 = 185,789 : x
2. Step 2: Convert to fraction form
   128,987/185,789 = 185,789/x
3. Step 3: Cross multiply
   128,987x = 185,789 × 185,789
4. Step 4: Simplify right side
   128,987x = 34,517,552,521
5. Step 5: Solve for x
   x = 34,517,552,521/128,987
6. Step 6: Final answer
   x = 267,604.89