Finding the Third Proportional to 121,150 and 248,344.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,150 : 248,344.50 = 248,344.50 : x
2. Step 2: Convert to fraction form
   121,150/248,344.50 = 248,344.50/x
3. Step 3: Cross multiply
   121,150x = 248,344.50 × 248,344.50
4. Step 4: Simplify right side
   121,150x = 61,674,990,680.25
5. Step 5: Solve for x
   x = 61,674,990,680.25/121,150
6. Step 6: Final answer
   x = 509,079.58