Finding the Third Proportional to 131,478 and 287,832

Step by Step Solution

1. Step 1: Write the proportion equation
   131,478 : 287,832 = 287,832 : x
2. Step 2: Convert to fraction form
   131,478/287,832 = 287,832/x
3. Step 3: Cross multiply
   131,478x = 287,832 × 287,832
4. Step 4: Simplify right side
   131,478x = 82,847,260,224
5. Step 5: Solve for x
   x = 82,847,260,224/131,478
6. Step 6: Final answer
   x = 630,122.61