Finding the Third Proportional to 139,454 and 287,164

Step by Step Solution

1. Step 1: Write the proportion equation
   139,454 : 287,164 = 287,164 : x
2. Step 2: Convert to fraction form
   139,454/287,164 = 287,164/x
3. Step 3: Cross multiply
   139,454x = 287,164 × 287,164
4. Step 4: Simplify right side
   139,454x = 82,463,162,896
5. Step 5: Solve for x
   x = 82,463,162,896/139,454
6. Step 6: Final answer
   x = 591,328.77