Finding the Third Proportional to 89,991 and 134,257.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,991 : 134,257.50 = 134,257.50 : x
2. Step 2: Convert to fraction form
   89,991/134,257.50 = 134,257.50/x
3. Step 3: Cross multiply
   89,991x = 134,257.50 × 134,257.50
4. Step 4: Simplify right side
   89,991x = 18,025,076,306.25
5. Step 5: Solve for x
   x = 18,025,076,306.25/89,991
6. Step 6: Final answer
   x = 200,298.66