Finding the Third Proportional to 12,700 and 19,942

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700 : 19,942 = 19,942 : x
2. Step 2: Convert to fraction form
   12,700/19,942 = 19,942/x
3. Step 3: Cross multiply
   12,700x = 19,942 × 19,942
4. Step 4: Simplify right side
   12,700x = 397,683,364
5. Step 5: Solve for x
   x = 397,683,364/12,700
6. Step 6: Final answer
   x = 31,313.65