Finding the Third Proportional to 139,590 and 199,379.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,590 : 199,379.25 = 199,379.25 : x
2. Step 2: Convert to fraction form
   139,590/199,379.25 = 199,379.25/x
3. Step 3: Cross multiply
   139,590x = 199,379.25 × 199,379.25
4. Step 4: Simplify right side
   139,590x = 39,752,085,330.56
5. Step 5: Solve for x
   x = 39,752,085,330.56/139,590
6. Step 6: Final answer
   x = 284,777.46