Finding the Third Proportional to 90,894 and 139,515

Step by Step Solution

1. Step 1: Write the proportion equation
   90,894 : 139,515 = 139,515 : x
2. Step 2: Convert to fraction form
   90,894/139,515 = 139,515/x
3. Step 3: Cross multiply
   90,894x = 139,515 × 139,515
4. Step 4: Simplify right side
   90,894x = 19,464,435,225
5. Step 5: Solve for x
   x = 19,464,435,225/90,894
6. Step 6: Final answer
   x = 214,144.34