Finding the Third Proportional to 90,658 and 140,724

Step by Step Solution

1. Step 1: Write the proportion equation
   90,658 : 140,724 = 140,724 : x
2. Step 2: Convert to fraction form
   90,658/140,724 = 140,724/x
3. Step 3: Cross multiply
   90,658x = 140,724 × 140,724
4. Step 4: Simplify right side
   90,658x = 19,803,244,176
5. Step 5: Solve for x
   x = 19,803,244,176/90,658
6. Step 6: Final answer
   x = 218,439.01