Finding the Third Proportional to 120,312 and 243,544.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,312 : 243,544.50 = 243,544.50 : x
2. Step 2: Convert to fraction form
   120,312/243,544.50 = 243,544.50/x
3. Step 3: Cross multiply
   120,312x = 243,544.50 × 243,544.50
4. Step 4: Simplify right side
   120,312x = 59,313,923,480.25
5. Step 5: Solve for x
   x = 59,313,923,480.25/120,312
6. Step 6: Final answer
   x = 493,000.89