Finding the Third Proportional to 90,630 and 137,865

Step by Step Solution

1. Step 1: Write the proportion equation
   90,630 : 137,865 = 137,865 : x
2. Step 2: Convert to fraction form
   90,630/137,865 = 137,865/x
3. Step 3: Cross multiply
   90,630x = 137,865 × 137,865
4. Step 4: Simplify right side
   90,630x = 19,006,758,225
5. Step 5: Solve for x
   x = 19,006,758,225/90,630
6. Step 6: Final answer
   x = 209,718.18