Finding the Third Proportional to 143,013 and 210,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,013 : 210,388.50 = 210,388.50 : x
2. Step 2: Convert to fraction form
   143,013/210,388.50 = 210,388.50/x
3. Step 3: Cross multiply
   143,013x = 210,388.50 × 210,388.50
4. Step 4: Simplify right side
   143,013x = 44,263,320,932.25
5. Step 5: Solve for x
   x = 44,263,320,932.25/143,013
6. Step 6: Final answer
   x = 309,505.58