Finding the Third Proportional to 55,389 and 121,849.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,389 : 121,849.50 = 121,849.50 : x
2. Step 2: Convert to fraction form
   55,389/121,849.50 = 121,849.50/x
3. Step 3: Cross multiply
   55,389x = 121,849.50 × 121,849.50
4. Step 4: Simplify right side
   55,389x = 14,847,300,650.25
5. Step 5: Solve for x
   x = 14,847,300,650.25/55,389
6. Step 6: Final answer
   x = 268,055.04