Finding the Third Proportional to 311,121 and 453,073.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,121 : 453,073.50 = 453,073.50 : x
2. Step 2: Convert to fraction form
   311,121/453,073.50 = 453,073.50/x
3. Step 3: Cross multiply
   311,121x = 453,073.50 × 453,073.50
4. Step 4: Simplify right side
   311,121x = 205,275,596,402.25
5. Step 5: Solve for x
   x = 205,275,596,402.25/311,121
6. Step 6: Final answer
   x = 659,793.45