Finding the Third Proportional to 252,918 and 381,046.50

Step by Step Solution

1. Step 1: Write the proportion equation
   252,918 : 381,046.50 = 381,046.50 : x
2. Step 2: Convert to fraction form
   252,918/381,046.50 = 381,046.50/x
3. Step 3: Cross multiply
   252,918x = 381,046.50 × 381,046.50
4. Step 4: Simplify right side
   252,918x = 145,196,435,162.25
5. Step 5: Solve for x
   x = 145,196,435,162.25/252,918
6. Step 6: Final answer
   x = 574,085.02