Finding the Third Proportional to 64,989 and 140,994

Step by Step Solution

1. Step 1: Write the proportion equation
   64,989 : 140,994 = 140,994 : x
2. Step 2: Convert to fraction form
   64,989/140,994 = 140,994/x
3. Step 3: Cross multiply
   64,989x = 140,994 × 140,994
4. Step 4: Simplify right side
   64,989x = 19,879,308,036
5. Step 5: Solve for x
   x = 19,879,308,036/64,989
6. Step 6: Final answer
   x = 305,887.27