Finding the Third Proportional to 142,264 and 288,620

Step by Step Solution

1. Step 1: Write the proportion equation
   142,264 : 288,620 = 288,620 : x
2. Step 2: Convert to fraction form
   142,264/288,620 = 288,620/x
3. Step 3: Cross multiply
   142,264x = 288,620 × 288,620
4. Step 4: Simplify right side
   142,264x = 83,301,504,400
5. Step 5: Solve for x
   x = 83,301,504,400/142,264
6. Step 6: Final answer
   x = 585,541.70