Finding the Third Proportional to 311,937 and 456,240

Step by Step Solution

1. Step 1: Write the proportion equation
   311,937 : 456,240 = 456,240 : x
2. Step 2: Convert to fraction form
   311,937/456,240 = 456,240/x
3. Step 3: Cross multiply
   311,937x = 456,240 × 456,240
4. Step 4: Simplify right side
   311,937x = 208,154,937,600
5. Step 5: Solve for x
   x = 208,154,937,600/311,937
6. Step 6: Final answer
   x = 667,298.00