Finding the Third Proportional to 90,612 and 139,958

Step by Step Solution

1. Step 1: Write the proportion equation
   90,612 : 139,958 = 139,958 : x
2. Step 2: Convert to fraction form
   90,612/139,958 = 139,958/x
3. Step 3: Cross multiply
   90,612x = 139,958 × 139,958
4. Step 4: Simplify right side
   90,612x = 19,588,241,764
5. Step 5: Solve for x
   x = 19,588,241,764/90,612
6. Step 6: Final answer
   x = 216,177.13