Finding the Third Proportional to 131,580 and 288,200

Step by Step Solution

1. Step 1: Write the proportion equation
   131,580 : 288,200 = 288,200 : x
2. Step 2: Convert to fraction form
   131,580/288,200 = 288,200/x
3. Step 3: Cross multiply
   131,580x = 288,200 × 288,200
4. Step 4: Simplify right side
   131,580x = 83,059,240,000
5. Step 5: Solve for x
   x = 83,059,240,000/131,580
6. Step 6: Final answer
   x = 631,245.17