Finding the Third Proportional to 258,861 and 604,594.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,861 : 604,594.50 = 604,594.50 : x
2. Step 2: Convert to fraction form
   258,861/604,594.50 = 604,594.50/x
3. Step 3: Cross multiply
   258,861x = 604,594.50 × 604,594.50
4. Step 4: Simplify right side
   258,861x = 365,534,509,430.25
5. Step 5: Solve for x
   x = 365,534,509,430.25/258,861
6. Step 6: Final answer
   x = 1,412,087.99