Finding the Third Proportional to 90,678 and 140,754

Step by Step Solution

1. Step 1: Write the proportion equation
   90,678 : 140,754 = 140,754 : x
2. Step 2: Convert to fraction form
   90,678/140,754 = 140,754/x
3. Step 3: Cross multiply
   90,678x = 140,754 × 140,754
4. Step 4: Simplify right side
   90,678x = 19,811,688,516
5. Step 5: Solve for x
   x = 19,811,688,516/90,678
6. Step 6: Final answer
   x = 218,483.96