Finding the Third Proportional to 60,230 and 90,789

Step by Step Solution

1. Step 1: Write the proportion equation
   60,230 : 90,789 = 90,789 : x
2. Step 2: Convert to fraction form
   60,230/90,789 = 90,789/x
3. Step 3: Cross multiply
   60,230x = 90,789 × 90,789
4. Step 4: Simplify right side
   60,230x = 8,242,642,521
5. Step 5: Solve for x
   x = 8,242,642,521/60,230
6. Step 6: Final answer
   x = 136,852.77