Finding the Third Proportional to 311,939 and 495,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,939 : 495,905.50 = 495,905.50 : x
2. Step 2: Convert to fraction form
   311,939/495,905.50 = 495,905.50/x
3. Step 3: Cross multiply
   311,939x = 495,905.50 × 495,905.50
4. Step 4: Simplify right side
   311,939x = 245,922,264,930.25
5. Step 5: Solve for x
   x = 245,922,264,930.25/311,939
6. Step 6: Final answer
   x = 788,366.52