Finding the Third Proportional to 64,890.75 and 140,796

Step by Step Solution

1. Step 1: Write the proportion equation
   64,890.75 : 140,796 = 140,796 : x
2. Step 2: Convert to fraction form
   64,890.75/140,796 = 140,796/x
3. Step 3: Cross multiply
   64,890.75x = 140,796 × 140,796
4. Step 4: Simplify right side
   64,890.75x = 19,823,513,616
5. Step 5: Solve for x
   x = 19,823,513,616/64,890.75
6. Step 6: Final answer
   x = 305,490.59