Finding the Third Proportional to 139,844.50 and 311,261

Step by Step Solution

1. Step 1: Write the proportion equation
   139,844.50 : 311,261 = 311,261 : x
2. Step 2: Convert to fraction form
   139,844.50/311,261 = 311,261/x
3. Step 3: Cross multiply
   139,844.50x = 311,261 × 311,261
4. Step 4: Simplify right side
   139,844.50x = 96,883,410,121
5. Step 5: Solve for x
   x = 96,883,410,121/139,844.50
6. Step 6: Final answer
   x = 692,793.85