Finding the Third Proportional to 67,878 and 149,139

Step by Step Solution

1. Step 1: Write the proportion equation
   67,878 : 149,139 = 149,139 : x
2. Step 2: Convert to fraction form
   67,878/149,139 = 149,139/x
3. Step 3: Cross multiply
   67,878x = 149,139 × 149,139
4. Step 4: Simplify right side
   67,878x = 22,242,441,321
5. Step 5: Solve for x
   x = 22,242,441,321/67,878
6. Step 6: Final answer
   x = 327,682.63