Finding the Third Proportional to 55,417.50 and 121,221

Step by Step Solution

1. Step 1: Write the proportion equation
   55,417.50 : 121,221 = 121,221 : x
2. Step 2: Convert to fraction form
   55,417.50/121,221 = 121,221/x
3. Step 3: Cross multiply
   55,417.50x = 121,221 × 121,221
4. Step 4: Simplify right side
   55,417.50x = 14,694,530,841
5. Step 5: Solve for x
   x = 14,694,530,841/55,417.50
6. Step 6: Final answer
   x = 265,160.48