Finding the Third Proportional to 131,661 and 288,323

Step by Step Solution

1. Step 1: Write the proportion equation
   131,661 : 288,323 = 288,323 : x
2. Step 2: Convert to fraction form
   131,661/288,323 = 288,323/x
3. Step 3: Cross multiply
   131,661x = 288,323 × 288,323
4. Step 4: Simplify right side
   131,661x = 83,130,152,329
5. Step 5: Solve for x
   x = 83,130,152,329/131,661
6. Step 6: Final answer
   x = 631,395.42