Finding the Third Proportional to 30,930.50 and 67,381

Step by Step Solution

1. Step 1: Write the proportion equation
   30,930.50 : 67,381 = 67,381 : x
2. Step 2: Convert to fraction form
   30,930.50/67,381 = 67,381/x
3. Step 3: Cross multiply
   30,930.50x = 67,381 × 67,381
4. Step 4: Simplify right side
   30,930.50x = 4,540,199,161
5. Step 5: Solve for x
   x = 4,540,199,161/30,930.50
6. Step 6: Final answer
   x = 146,787.12