Finding the Third Proportional to 143,885.50 and 213,037.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,885.50 : 213,037.50 = 213,037.50 : x
2. Step 2: Convert to fraction form
   143,885.50/213,037.50 = 213,037.50/x
3. Step 3: Cross multiply
   143,885.50x = 213,037.50 × 213,037.50
4. Step 4: Simplify right side
   143,885.50x = 45,384,976,406.25
5. Step 5: Solve for x
   x = 45,384,976,406.25/143,885.50
6. Step 6: Final answer
   x = 315,424.25