Finding the Third Proportional to 131,448 and 286,380

Step by Step Solution

1. Step 1: Write the proportion equation
   131,448 : 286,380 = 286,380 : x
2. Step 2: Convert to fraction form
   131,448/286,380 = 286,380/x
3. Step 3: Cross multiply
   131,448x = 286,380 × 286,380
4. Step 4: Simplify right side
   131,448x = 82,013,504,400
5. Step 5: Solve for x
   x = 82,013,504,400/131,448
6. Step 6: Final answer
   x = 623,923.56