Finding the Third Proportional to 88,990 and 137,745

Step by Step Solution

1. Step 1: Write the proportion equation
   88,990 : 137,745 = 137,745 : x
2. Step 2: Convert to fraction form
   88,990/137,745 = 137,745/x
3. Step 3: Cross multiply
   88,990x = 137,745 × 137,745
4. Step 4: Simplify right side
   88,990x = 18,973,685,025
5. Step 5: Solve for x
   x = 18,973,685,025/88,990
6. Step 6: Final answer
   x = 213,211.43