Finding the Third Proportional to 131,307 and 280,109

Step by Step Solution

1. Step 1: Write the proportion equation
   131,307 : 280,109 = 280,109 : x
2. Step 2: Convert to fraction form
   131,307/280,109 = 280,109/x
3. Step 3: Cross multiply
   131,307x = 280,109 × 280,109
4. Step 4: Simplify right side
   131,307x = 78,461,051,881
5. Step 5: Solve for x
   x = 78,461,051,881/131,307
6. Step 6: Final answer
   x = 597,538.99