Finding the Third Proportional to 90,879 and 137,958

Step by Step Solution

1. Step 1: Write the proportion equation
   90,879 : 137,958 = 137,958 : x
2. Step 2: Convert to fraction form
   90,879/137,958 = 137,958/x
3. Step 3: Cross multiply
   90,879x = 137,958 × 137,958
4. Step 4: Simplify right side
   90,879x = 19,032,409,764
5. Step 5: Solve for x
   x = 19,032,409,764/90,879
6. Step 6: Final answer
   x = 209,425.83