Finding the Third Proportional to 31,515 and 67,808.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,515 : 67,808.63 = 67,808.63 : x
2. Step 2: Convert to fraction form
   31,515/67,808.63 = 67,808.63/x
3. Step 3: Cross multiply
   31,515x = 67,808.63 × 67,808.63
4. Step 4: Simplify right side
   31,515x = 4,598,009,624.39
5. Step 5: Solve for x
   x = 4,598,009,624.39/31,515
6. Step 6: Final answer
   x = 145,899.08