Finding the Third Proportional to 121,248 and 263,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,248 : 263,479.50 = 263,479.50 : x
2. Step 2: Convert to fraction form
   121,248/263,479.50 = 263,479.50/x
3. Step 3: Cross multiply
   121,248x = 263,479.50 × 263,479.50
4. Step 4: Simplify right side
   121,248x = 69,421,446,920.25
5. Step 5: Solve for x
   x = 69,421,446,920.25/121,248
6. Step 6: Final answer
   x = 572,557.46