Finding the Third Proportional to 135,690 and 207,058.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,690 : 207,058.50 = 207,058.50 : x
2. Step 2: Convert to fraction form
   135,690/207,058.50 = 207,058.50/x
3. Step 3: Cross multiply
   135,690x = 207,058.50 × 207,058.50
4. Step 4: Simplify right side
   135,690x = 42,873,222,422.25
5. Step 5: Solve for x
   x = 42,873,222,422.25/135,690
6. Step 6: Final answer
   x = 315,964.50