Finding the Third Proportional to 139,120 and 299,984

Step by Step Solution

1. Step 1: Write the proportion equation
   139,120 : 299,984 = 299,984 : x
2. Step 2: Convert to fraction form
   139,120/299,984 = 299,984/x
3. Step 3: Cross multiply
   139,120x = 299,984 × 299,984
4. Step 4: Simplify right side
   139,120x = 89,990,400,256
5. Step 5: Solve for x
   x = 89,990,400,256/139,120
6. Step 6: Final answer
   x = 646,854.52