Finding the Third Proportional to 61,605.50 and 90,212.25

Step by Step Solution

1. Step 1: Write the proportion equation
   61,605.50 : 90,212.25 = 90,212.25 : x
2. Step 2: Convert to fraction form
   61,605.50/90,212.25 = 90,212.25/x
3. Step 3: Cross multiply
   61,605.50x = 90,212.25 × 90,212.25
4. Step 4: Simplify right side
   61,605.50x = 8,138,250,050.06
5. Step 5: Solve for x
   x = 8,138,250,050.06/61,605.50
6. Step 6: Final answer
   x = 132,102.65