Finding the Third Proportional to 213,599.50 and 331,168

Step by Step Solution

1. Step 1: Write the proportion equation
   213,599.50 : 331,168 = 331,168 : x
2. Step 2: Convert to fraction form
   213,599.50/331,168 = 331,168/x
3. Step 3: Cross multiply
   213,599.50x = 331,168 × 331,168
4. Step 4: Simplify right side
   213,599.50x = 109,672,244,224
5. Step 5: Solve for x
   x = 109,672,244,224/213,599.50
6. Step 6: Final answer
   x = 513,448.04