Finding the Third Proportional to 121,530 and 252,739.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,530 : 252,739.50 = 252,739.50 : x
2. Step 2: Convert to fraction form
   121,530/252,739.50 = 252,739.50/x
3. Step 3: Cross multiply
   121,530x = 252,739.50 × 252,739.50
4. Step 4: Simplify right side
   121,530x = 63,877,254,860.25
5. Step 5: Solve for x
   x = 63,877,254,860.25/121,530
6. Step 6: Final answer
   x = 525,608.94