Finding the Third Proportional to 63,139 and 140,292

Step by Step Solution

1. Step 1: Write the proportion equation
   63,139 : 140,292 = 140,292 : x
2. Step 2: Convert to fraction form
   63,139/140,292 = 140,292/x
3. Step 3: Cross multiply
   63,139x = 140,292 × 140,292
4. Step 4: Simplify right side
   63,139x = 19,681,845,264
5. Step 5: Solve for x
   x = 19,681,845,264/63,139
6. Step 6: Final answer
   x = 311,722.47