Finding the Third Proportional to 139,333.50 and 298,356.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,333.50 : 298,356.75 = 298,356.75 : x
2. Step 2: Convert to fraction form
   139,333.50/298,356.75 = 298,356.75/x
3. Step 3: Cross multiply
   139,333.50x = 298,356.75 × 298,356.75
4. Step 4: Simplify right side
   139,333.50x = 89,016,750,270.56
5. Step 5: Solve for x
   x = 89,016,750,270.56/139,333.50
6. Step 6: Final answer
   x = 638,875.43