Finding the Third Proportional to 213,973.50 and 331,140

Step by Step Solution

1. Step 1: Write the proportion equation
   213,973.50 : 331,140 = 331,140 : x
2. Step 2: Convert to fraction form
   213,973.50/331,140 = 331,140/x
3. Step 3: Cross multiply
   213,973.50x = 331,140 × 331,140
4. Step 4: Simplify right side
   213,973.50x = 109,653,699,600
5. Step 5: Solve for x
   x = 109,653,699,600/213,973.50
6. Step 6: Final answer
   x = 512,463.92