Finding the Third Proportional to 142,860 and 215,586

Step by Step Solution

1. Step 1: Write the proportion equation
   142,860 : 215,586 = 215,586 : x
2. Step 2: Convert to fraction form
   142,860/215,586 = 215,586/x
3. Step 3: Cross multiply
   142,860x = 215,586 × 215,586
4. Step 4: Simplify right side
   142,860x = 46,477,323,396
5. Step 5: Solve for x
   x = 46,477,323,396/142,860
6. Step 6: Final answer
   x = 325,334.76