Finding the Third Proportional to 131,298 and 286,360

Step by Step Solution

1. Step 1: Write the proportion equation
   131,298 : 286,360 = 286,360 : x
2. Step 2: Convert to fraction form
   131,298/286,360 = 286,360/x
3. Step 3: Cross multiply
   131,298x = 286,360 × 286,360
4. Step 4: Simplify right side
   131,298x = 82,002,049,600
5. Step 5: Solve for x
   x = 82,002,049,600/131,298
6. Step 6: Final answer
   x = 624,549.11