Finding the Third Proportional to 30,985.35 and 67,122.11

Step by Step Solution

1. Step 1: Write the proportion equation
   30,985.35 : 67,122.11 = 67,122.11 : x
2. Step 2: Convert to fraction form
   30,985.35/67,122.11 = 67,122.11/x
3. Step 3: Cross multiply
   30,985.35x = 67,122.11 × 67,122.11
4. Step 4: Simplify right side
   30,985.35x = 4,505,377,042.56
5. Step 5: Solve for x
   x = 4,505,377,042.56/30,985.35
6. Step 6: Final answer
   x = 145,403.47