Finding the Third Proportional to 132,289.50 and 290,916

Step by Step Solution

1. Step 1: Write the proportion equation
   132,289.50 : 290,916 = 290,916 : x
2. Step 2: Convert to fraction form
   132,289.50/290,916 = 290,916/x
3. Step 3: Cross multiply
   132,289.50x = 290,916 × 290,916
4. Step 4: Simplify right side
   132,289.50x = 84,632,119,056
5. Step 5: Solve for x
   x = 84,632,119,056/132,289.50
6. Step 6: Final answer
   x = 639,749.33