Finding the Third Proportional to 131,468 and 287,813

Step by Step Solution

1. Step 1: Write the proportion equation
   131,468 : 287,813 = 287,813 : x
2. Step 2: Convert to fraction form
   131,468/287,813 = 287,813/x
3. Step 3: Cross multiply
   131,468x = 287,813 × 287,813
4. Step 4: Simplify right side
   131,468x = 82,836,322,969
5. Step 5: Solve for x
   x = 82,836,322,969/131,468
6. Step 6: Final answer
   x = 630,087.34