Finding the Third Proportional to 30,885.75 and 67,435.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,885.75 : 67,435.25 = 67,435.25 : x
2. Step 2: Convert to fraction form
   30,885.75/67,435.25 = 67,435.25/x
3. Step 3: Cross multiply
   30,885.75x = 67,435.25 × 67,435.25
4. Step 4: Simplify right side
   30,885.75x = 4,547,512,942.56
5. Step 5: Solve for x
   x = 4,547,512,942.56/30,885.75
6. Step 6: Final answer
   x = 147,236.60