Finding the Third Proportional to 131,278.50 and 288,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,278.50 : 288,085.50 = 288,085.50 : x
2. Step 2: Convert to fraction form
   131,278.50/288,085.50 = 288,085.50/x
3. Step 3: Cross multiply
   131,278.50x = 288,085.50 × 288,085.50
4. Step 4: Simplify right side
   131,278.50x = 82,993,255,310.25
5. Step 5: Solve for x
   x = 82,993,255,310.25/131,278.50
6. Step 6: Final answer
   x = 632,192.29