Finding the Third Proportional to 142,953.50 and 210,272

Step by Step Solution

1. Step 1: Write the proportion equation
   142,953.50 : 210,272 = 210,272 : x
2. Step 2: Convert to fraction form
   142,953.50/210,272 = 210,272/x
3. Step 3: Cross multiply
   142,953.50x = 210,272 × 210,272
4. Step 4: Simplify right side
   142,953.50x = 44,214,313,984
5. Step 5: Solve for x
   x = 44,214,313,984/142,953.50
6. Step 6: Final answer
   x = 309,291.58