Finding the Third Proportional to 67,788 and 140,292

Step by Step Solution

1. Step 1: Write the proportion equation
   67,788 : 140,292 = 140,292 : x
2. Step 2: Convert to fraction form
   67,788/140,292 = 140,292/x
3. Step 3: Cross multiply
   67,788x = 140,292 × 140,292
4. Step 4: Simplify right side
   67,788x = 19,681,845,264
5. Step 5: Solve for x
   x = 19,681,845,264/67,788
6. Step 6: Final answer
   x = 290,344.09