Finding the Third Proportional to 63,111 and 135,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,111 : 135,087.50 = 135,087.50 : x
2. Step 2: Convert to fraction form
   63,111/135,087.50 = 135,087.50/x
3. Step 3: Cross multiply
   63,111x = 135,087.50 × 135,087.50
4. Step 4: Simplify right side
   63,111x = 18,248,632,656.25
5. Step 5: Solve for x
   x = 18,248,632,656.25/63,111
6. Step 6: Final answer
   x = 289,151.38