Finding the Third Proportional to 131,291 and 288,111

Step by Step Solution

1. Step 1: Write the proportion equation
   131,291 : 288,111 = 288,111 : x
2. Step 2: Convert to fraction form
   131,291/288,111 = 288,111/x
3. Step 3: Cross multiply
   131,291x = 288,111 × 288,111
4. Step 4: Simplify right side
   131,291x = 83,007,948,321
5. Step 5: Solve for x
   x = 83,007,948,321/131,291
6. Step 6: Final answer
   x = 632,244.01