Finding the Third Proportional to 58,710 and 90,945

Step by Step Solution

1. Step 1: Write the proportion equation
   58,710 : 90,945 = 90,945 : x
2. Step 2: Convert to fraction form
   58,710/90,945 = 90,945/x
3. Step 3: Cross multiply
   58,710x = 90,945 × 90,945
4. Step 4: Simplify right side
   58,710x = 8,270,993,025
5. Step 5: Solve for x
   x = 8,270,993,025/58,710
6. Step 6: Final answer
   x = 140,878.78