Finding the Third Proportional to 131,469 and 287,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,469 : 287,815.50 = 287,815.50 : x
2. Step 2: Convert to fraction form
   131,469/287,815.50 = 287,815.50/x
3. Step 3: Cross multiply
   131,469x = 287,815.50 × 287,815.50
4. Step 4: Simplify right side
   131,469x = 82,837,762,040.25
5. Step 5: Solve for x
   x = 82,837,762,040.25/131,469
6. Step 6: Final answer
   x = 630,093.50