Finding the Third Proportional to 90,626 and 137,859

Step by Step Solution

1. Step 1: Write the proportion equation
   90,626 : 137,859 = 137,859 : x
2. Step 2: Convert to fraction form
   90,626/137,859 = 137,859/x
3. Step 3: Cross multiply
   90,626x = 137,859 × 137,859
4. Step 4: Simplify right side
   90,626x = 19,005,103,881
5. Step 5: Solve for x
   x = 19,005,103,881/90,626
6. Step 6: Final answer
   x = 209,709.18