Finding the Third Proportional to 31,331.81 and 67,037.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,331.81 : 67,037.63 = 67,037.63 : x
2. Step 2: Convert to fraction form
   31,331.81/67,037.63 = 67,037.63/x
3. Step 3: Cross multiply
   31,331.81x = 67,037.63 × 67,037.63
4. Step 4: Simplify right side
   31,331.81x = 4,494,043,165.64
5. Step 5: Solve for x
   x = 4,494,043,165.64/31,331.81
6. Step 6: Final answer
   x = 143,433.87