Finding the Third Proportional to 139,544 and 286,432

Step by Step Solution

1. Step 1: Write the proportion equation
   139,544 : 286,432 = 286,432 : x
2. Step 2: Convert to fraction form
   139,544/286,432 = 286,432/x
3. Step 3: Cross multiply
   139,544x = 286,432 × 286,432
4. Step 4: Simplify right side
   139,544x = 82,043,290,624
5. Step 5: Solve for x
   x = 82,043,290,624/139,544
6. Step 6: Final answer
   x = 587,938.50