Finding the Third Proportional to 68,100.75 and 149,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,100.75 : 149,638.50 = 149,638.50 : x
2. Step 2: Convert to fraction form
   68,100.75/149,638.50 = 149,638.50/x
3. Step 3: Cross multiply
   68,100.75x = 149,638.50 × 149,638.50
4. Step 4: Simplify right side
   68,100.75x = 22,391,680,682.25
5. Step 5: Solve for x
   x = 22,391,680,682.25/68,100.75
6. Step 6: Final answer
   x = 328,802.26