Finding the Third Proportional to 290,749.50 and 616,028

Step by Step Solution

1. Step 1: Write the proportion equation
   290,749.50 : 616,028 = 616,028 : x
2. Step 2: Convert to fraction form
   290,749.50/616,028 = 616,028/x
3. Step 3: Cross multiply
   290,749.50x = 616,028 × 616,028
4. Step 4: Simplify right side
   290,749.50x = 379,490,496,784
5. Step 5: Solve for x
   x = 379,490,496,784/290,749.50
6. Step 6: Final answer
   x = 1,305,214.62