Finding the Third Proportional to 90,318 and 140,648

Step by Step Solution

1. Step 1: Write the proportion equation
   90,318 : 140,648 = 140,648 : x
2. Step 2: Convert to fraction form
   90,318/140,648 = 140,648/x
3. Step 3: Cross multiply
   90,318x = 140,648 × 140,648
4. Step 4: Simplify right side
   90,318x = 19,781,859,904
5. Step 5: Solve for x
   x = 19,781,859,904/90,318
6. Step 6: Final answer
   x = 219,024.56