Finding the Third Proportional to 121,356.50 and 264,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,356.50 : 264,018.50 = 264,018.50 : x
2. Step 2: Convert to fraction form
   121,356.50/264,018.50 = 264,018.50/x
3. Step 3: Cross multiply
   121,356.50x = 264,018.50 × 264,018.50
4. Step 4: Simplify right side
   121,356.50x = 69,705,768,342.25
5. Step 5: Solve for x
   x = 69,705,768,342.25/121,356.50
6. Step 6: Final answer
   x = 574,388.42