Finding the Third Proportional to 142,488 and 307,818

Step by Step Solution

1. Step 1: Write the proportion equation
   142,488 : 307,818 = 307,818 : x
2. Step 2: Convert to fraction form
   142,488/307,818 = 307,818/x
3. Step 3: Cross multiply
   142,488x = 307,818 × 307,818
4. Step 4: Simplify right side
   142,488x = 94,751,921,124
5. Step 5: Solve for x
   x = 94,751,921,124/142,488
6. Step 6: Final answer
   x = 664,981.76