Finding the Third Proportional to 31,665.94 and 67,219.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,665.94 : 67,219.88 = 67,219.88 : x
2. Step 2: Convert to fraction form
   31,665.94/67,219.88 = 67,219.88/x
3. Step 3: Cross multiply
   31,665.94x = 67,219.88 × 67,219.88
4. Step 4: Simplify right side
   31,665.94x = 4,518,511,595.02
5. Step 5: Solve for x
   x = 4,518,511,595.02/31,665.94
6. Step 6: Final answer
   x = 142,693.13