Finding the Third Proportional to 258,918 and 349,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,918 : 349,816.50 = 349,816.50 : x
2. Step 2: Convert to fraction form
   258,918/349,816.50 = 349,816.50/x
3. Step 3: Cross multiply
   258,918x = 349,816.50 × 349,816.50
4. Step 4: Simplify right side
   258,918x = 122,371,583,672.25
5. Step 5: Solve for x
   x = 122,371,583,672.25/258,918
6. Step 6: Final answer
   x = 472,626.79