Finding the Third Proportional to 139,077.50 and 284,766.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,077.50 : 284,766.75 = 284,766.75 : x
2. Step 2: Convert to fraction form
   139,077.50/284,766.75 = 284,766.75/x
3. Step 3: Cross multiply
   139,077.50x = 284,766.75 × 284,766.75
4. Step 4: Simplify right side
   139,077.50x = 81,092,101,905.56
5. Step 5: Solve for x
   x = 81,092,101,905.56/139,077.50
6. Step 6: Final answer
   x = 583,071.32