Finding the Third Proportional to 15,368 and 31,390

Step by Step Solution

1. Step 1: Write the proportion equation
   15,368 : 31,390 = 31,390 : x
2. Step 2: Convert to fraction form
   15,368/31,390 = 31,390/x
3. Step 3: Cross multiply
   15,368x = 31,390 × 31,390
4. Step 4: Simplify right side
   15,368x = 985,332,100
5. Step 5: Solve for x
   x = 985,332,100/15,368
6. Step 6: Final answer
   x = 64,115.83