Finding the Third Proportional to 143,140 and 210,334

Step by Step Solution

1. Step 1: Write the proportion equation
   143,140 : 210,334 = 210,334 : x
2. Step 2: Convert to fraction form
   143,140/210,334 = 210,334/x
3. Step 3: Cross multiply
   143,140x = 210,334 × 210,334
4. Step 4: Simplify right side
   143,140x = 44,240,391,556
5. Step 5: Solve for x
   x = 44,240,391,556/143,140
6. Step 6: Final answer
   x = 309,070.78