Finding the Third Proportional to 211,437 and 300,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,437 : 300,631.50 = 300,631.50 : x
2. Step 2: Convert to fraction form
   211,437/300,631.50 = 300,631.50/x
3. Step 3: Cross multiply
   211,437x = 300,631.50 × 300,631.50
4. Step 4: Simplify right side
   211,437x = 90,379,298,792.25
5. Step 5: Solve for x
   x = 90,379,298,792.25/211,437
6. Step 6: Final answer
   x = 427,452.62