Finding the Third Proportional to 131,509.88 and 287,621.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131,509.88 : 287,621.25 = 287,621.25 : x
2. Step 2: Convert to fraction form
   131,509.88/287,621.25 = 287,621.25/x
3. Step 3: Cross multiply
   131,509.88x = 287,621.25 × 287,621.25
4. Step 4: Simplify right side
   131,509.88x = 82,725,983,451.56
5. Step 5: Solve for x
   x = 82,725,983,451.56/131,509.88
6. Step 6: Final answer
   x = 629,047.69