Finding the Third Proportional to 143,433 and 312,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,433 : 312,198.50 = 312,198.50 : x
2. Step 2: Convert to fraction form
   143,433/312,198.50 = 312,198.50/x
3. Step 3: Cross multiply
   143,433x = 312,198.50 × 312,198.50
4. Step 4: Simplify right side
   143,433x = 97,467,903,402.25
5. Step 5: Solve for x
   x = 97,467,903,402.25/143,433
6. Step 6: Final answer
   x = 679,536.11