Finding the Third Proportional to 87,736 and 137,490

Step by Step Solution

1. Step 1: Write the proportion equation
   87,736 : 137,490 = 137,490 : x
2. Step 2: Convert to fraction form
   87,736/137,490 = 137,490/x
3. Step 3: Cross multiply
   87,736x = 137,490 × 137,490
4. Step 4: Simplify right side
   87,736x = 18,903,500,100
5. Step 5: Solve for x
   x = 18,903,500,100/87,736
6. Step 6: Final answer
   x = 215,458.88