Finding the Third Proportional to 90,368 and 139,800

Step by Step Solution

1. Step 1: Write the proportion equation
   90,368 : 139,800 = 139,800 : x
2. Step 2: Convert to fraction form
   90,368/139,800 = 139,800/x
3. Step 3: Cross multiply
   90,368x = 139,800 × 139,800
4. Step 4: Simplify right side
   90,368x = 19,544,040,000
5. Step 5: Solve for x
   x = 19,544,040,000/90,368
6. Step 6: Final answer
   x = 216,271.69