Finding the Third Proportional to 121,015.69 and 262,443.38

Step by Step Solution

1. Step 1: Write the proportion equation
   121,015.69 : 262,443.38 = 262,443.38 : x
2. Step 2: Convert to fraction form
   121,015.69/262,443.38 = 262,443.38/x
3. Step 3: Cross multiply
   121,015.69x = 262,443.38 × 262,443.38
4. Step 4: Simplify right side
   121,015.69x = 68,876,525,081.39
5. Step 5: Solve for x
   x = 68,876,525,081.39/121,015.69
6. Step 6: Final answer
   x = 569,153.69