Finding the Third Proportional to 132,390 and 288,076

Step by Step Solution

1. Step 1: Write the proportion equation
   132,390 : 288,076 = 288,076 : x
2. Step 2: Convert to fraction form
   132,390/288,076 = 288,076/x
3. Step 3: Cross multiply
   132,390x = 288,076 × 288,076
4. Step 4: Simplify right side
   132,390x = 82,987,781,776
5. Step 5: Solve for x
   x = 82,987,781,776/132,390
6. Step 6: Final answer
   x = 626,843.28