Finding the Third Proportional to 131,402 and 288,240

Step by Step Solution

1. Step 1: Write the proportion equation
   131,402 : 288,240 = 288,240 : x
2. Step 2: Convert to fraction form
   131,402/288,240 = 288,240/x
3. Step 3: Cross multiply
   131,402x = 288,240 × 288,240
4. Step 4: Simplify right side
   131,402x = 83,082,297,600
5. Step 5: Solve for x
   x = 83,082,297,600/131,402
6. Step 6: Final answer
   x = 632,275.75