Finding the Third Proportional to 318,937 and 493,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,937 : 493,840.50 = 493,840.50 : x
2. Step 2: Convert to fraction form
   318,937/493,840.50 = 493,840.50/x
3. Step 3: Cross multiply
   318,937x = 493,840.50 × 493,840.50
4. Step 4: Simplify right side
   318,937x = 243,878,439,440.25
5. Step 5: Solve for x
   x = 243,878,439,440.25/318,937
6. Step 6: Final answer
   x = 764,660.23