Finding the Third Proportional to 139,188 and 203,760

Step by Step Solution

1. Step 1: Write the proportion equation
   139,188 : 203,760 = 203,760 : x
2. Step 2: Convert to fraction form
   139,188/203,760 = 203,760/x
3. Step 3: Cross multiply
   139,188x = 203,760 × 203,760
4. Step 4: Simplify right side
   139,188x = 41,518,137,600
5. Step 5: Solve for x
   x = 41,518,137,600/139,188
6. Step 6: Final answer
   x = 298,288.20