Finding the Third Proportional to 311,890.50 and 656,373.38

Step by Step Solution

1. Step 1: Write the proportion equation
   311,890.50 : 656,373.38 = 656,373.38 : x
2. Step 2: Convert to fraction form
   311,890.50/656,373.38 = 656,373.38/x
3. Step 3: Cross multiply
   311,890.50x = 656,373.38 × 656,373.38
4. Step 4: Simplify right side
   311,890.50x = 430,826,007,408.89
5. Step 5: Solve for x
   x = 430,826,007,408.89/311,890.50
6. Step 6: Final answer
   x = 1,381,337.38