Finding the Third Proportional to 143,112 and 210,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,112 : 210,291.50 = 210,291.50 : x
2. Step 2: Convert to fraction form
   143,112/210,291.50 = 210,291.50/x
3. Step 3: Cross multiply
   143,112x = 210,291.50 × 210,291.50
4. Step 4: Simplify right side
   143,112x = 44,222,514,972.25
5. Step 5: Solve for x
   x = 44,222,514,972.25/143,112
6. Step 6: Final answer
   x = 309,006.34