Finding the Third Proportional to 139,394 and 286,180

Step by Step Solution

1. Step 1: Write the proportion equation
   139,394 : 286,180 = 286,180 : x
2. Step 2: Convert to fraction form
   139,394/286,180 = 286,180/x
3. Step 3: Cross multiply
   139,394x = 286,180 × 286,180
4. Step 4: Simplify right side
   139,394x = 81,898,992,400
5. Step 5: Solve for x
   x = 81,898,992,400/139,394
6. Step 6: Final answer
   x = 587,535.99