Finding the Third Proportional to 300,400.50 and 609,090

Step by Step Solution

1. Step 1: Write the proportion equation
   300,400.50 : 609,090 = 609,090 : x
2. Step 2: Convert to fraction form
   300,400.50/609,090 = 609,090/x
3. Step 3: Cross multiply
   300,400.50x = 609,090 × 609,090
4. Step 4: Simplify right side
   300,400.50x = 370,990,628,100
5. Step 5: Solve for x
   x = 370,990,628,100/300,400.50
6. Step 6: Final answer
   x = 1,234,986.72