Finding the Third Proportional to 31,123.50 and 68,322

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.50 : 68,322 = 68,322 : x
2. Step 2: Convert to fraction form
   31,123.50/68,322 = 68,322/x
3. Step 3: Cross multiply
   31,123.50x = 68,322 × 68,322
4. Step 4: Simplify right side
   31,123.50x = 4,667,895,684
5. Step 5: Solve for x
   x = 4,667,895,684/31,123.50
6. Step 6: Final answer
   x = 149,979.78