Finding the Third Proportional to 88,690 and 137,700

Step by Step Solution

1. Step 1: Write the proportion equation
   88,690 : 137,700 = 137,700 : x
2. Step 2: Convert to fraction form
   88,690/137,700 = 137,700/x
3. Step 3: Cross multiply
   88,690x = 137,700 × 137,700
4. Step 4: Simplify right side
   88,690x = 18,961,290,000
5. Step 5: Solve for x
   x = 18,961,290,000/88,690
6. Step 6: Final answer
   x = 213,792.87