Finding the Third Proportional to 302,698.50 and 664,440

Step by Step Solution

1. Step 1: Write the proportion equation
   302,698.50 : 664,440 = 664,440 : x
2. Step 2: Convert to fraction form
   302,698.50/664,440 = 664,440/x
3. Step 3: Cross multiply
   302,698.50x = 664,440 × 664,440
4. Step 4: Simplify right side
   302,698.50x = 441,480,513,600
5. Step 5: Solve for x
   x = 441,480,513,600/302,698.50
6. Step 6: Final answer
   x = 1,458,482.66