Finding the Third Proportional to 139,455 and 287,164.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,455 : 287,164.50 = 287,164.50 : x
2. Step 2: Convert to fraction form
   139,455/287,164.50 = 287,164.50/x
3. Step 3: Cross multiply
   139,455x = 287,164.50 × 287,164.50
4. Step 4: Simplify right side
   139,455x = 82,463,450,060.25
5. Step 5: Solve for x
   x = 82,463,450,060.25/139,455
6. Step 6: Final answer
   x = 591,326.59