Finding the Third Proportional to 90,313 and 140,640

Step by Step Solution

1. Step 1: Write the proportion equation
   90,313 : 140,640 = 140,640 : x
2. Step 2: Convert to fraction form
   90,313/140,640 = 140,640/x
3. Step 3: Cross multiply
   90,313x = 140,640 × 140,640
4. Step 4: Simplify right side
   90,313x = 19,779,609,600
5. Step 5: Solve for x
   x = 19,779,609,600/90,313
6. Step 6: Final answer
   x = 219,011.77