Finding the Third Proportional to 132,979 and 288,111

Step by Step Solution

1. Step 1: Write the proportion equation
   132,979 : 288,111 = 288,111 : x
2. Step 2: Convert to fraction form
   132,979/288,111 = 288,111/x
3. Step 3: Cross multiply
   132,979x = 288,111 × 288,111
4. Step 4: Simplify right side
   132,979x = 83,007,948,321
5. Step 5: Solve for x
   x = 83,007,948,321/132,979
6. Step 6: Final answer
   x = 624,218.47