Finding the Third Proportional to 608,617 and 890,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   608,617 : 890,389.50 = 890,389.50 : x
2. Step 2: Convert to fraction form
   608,617/890,389.50 = 890,389.50/x
3. Step 3: Cross multiply
   608,617x = 890,389.50 × 890,389.50
4. Step 4: Simplify right side
   608,617x = 792,793,461,710.25
5. Step 5: Solve for x
   x = 792,793,461,710.25/608,617
6. Step 6: Final answer
   x = 1,302,614.72