Finding the Third Proportional to 142,870 and 215,602

Step by Step Solution

1. Step 1: Write the proportion equation
   142,870 : 215,602 = 215,602 : x
2. Step 2: Convert to fraction form
   142,870/215,602 = 215,602/x
3. Step 3: Cross multiply
   142,870x = 215,602 × 215,602
4. Step 4: Simplify right side
   142,870x = 46,484,222,404
5. Step 5: Solve for x
   x = 46,484,222,404/142,870
6. Step 6: Final answer
   x = 325,360.27