Finding the Third Proportional to 31,706 and 42,515

Step by Step Solution

1. Step 1: Write the proportion equation
   31,706 : 42,515 = 42,515 : x
2. Step 2: Convert to fraction form
   31,706/42,515 = 42,515/x
3. Step 3: Cross multiply
   31,706x = 42,515 × 42,515
4. Step 4: Simplify right side
   31,706x = 1,807,525,225
5. Step 5: Solve for x
   x = 1,807,525,225/31,706
6. Step 6: Final answer
   x = 57,008.93