Finding the Third Proportional to 291,147 and 617,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,147 : 617,285.50 = 617,285.50 : x
2. Step 2: Convert to fraction form
   291,147/617,285.50 = 617,285.50/x
3. Step 3: Cross multiply
   291,147x = 617,285.50 × 617,285.50
4. Step 4: Simplify right side
   291,147x = 381,041,388,510.25
5. Step 5: Solve for x
   x = 381,041,388,510.25/291,147
6. Step 6: Final answer
   x = 1,308,759.45