Finding the Third Proportional to 64,907 and 139,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,907 : 139,858.50 = 139,858.50 : x
2. Step 2: Convert to fraction form
   64,907/139,858.50 = 139,858.50/x
3. Step 3: Cross multiply
   64,907x = 139,858.50 × 139,858.50
4. Step 4: Simplify right side
   64,907x = 19,560,400,022.25
5. Step 5: Solve for x
   x = 19,560,400,022.25/64,907
6. Step 6: Final answer
   x = 301,360.41