Finding the Third Proportional to 139,447.69 and 302,078.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,447.69 : 302,078.81 = 302,078.81 : x
2. Step 2: Convert to fraction form
   139,447.69/302,078.81 = 302,078.81/x
3. Step 3: Cross multiply
   139,447.69x = 302,078.81 × 302,078.81
4. Step 4: Simplify right side
   139,447.69x = 91,251,608,961.41
5. Step 5: Solve for x
   x = 91,251,608,961.41/139,447.69
6. Step 6: Final answer
   x = 654,378.79