Finding the Third Proportional to 32,989.78 and 68,428.55

Step by Step Solution

1. Step 1: Write the proportion equation
   32,989.78 : 68,428.55 = 68,428.55 : x
2. Step 2: Convert to fraction form
   32,989.78/68,428.55 = 68,428.55/x
3. Step 3: Cross multiply
   32,989.78x = 68,428.55 × 68,428.55
4. Step 4: Simplify right side
   32,989.78x = 4,682,466,027.42
5. Step 5: Solve for x
   x = 4,682,466,027.42/32,989.78
6. Step 6: Final answer
   x = 141,936.86