Finding the Third Proportional to 89,428.50 and 189,515.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,428.50 : 189,515.25 = 189,515.25 : x
2. Step 2: Convert to fraction form
   89,428.50/189,515.25 = 189,515.25/x
3. Step 3: Cross multiply
   89,428.50x = 189,515.25 × 189,515.25
4. Step 4: Simplify right side
   89,428.50x = 35,916,029,982.56
5. Step 5: Solve for x
   x = 35,916,029,982.56/89,428.50
6. Step 6: Final answer
   x = 401,617.27