Finding the Third Proportional to 309,672 and 452,558.25

Step by Step Solution

1. Step 1: Write the proportion equation
   309,672 : 452,558.25 = 452,558.25 : x
2. Step 2: Convert to fraction form
   309,672/452,558.25 = 452,558.25/x
3. Step 3: Cross multiply
   309,672x = 452,558.25 × 452,558.25
4. Step 4: Simplify right side
   309,672x = 204,808,969,643.06
5. Step 5: Solve for x
   x = 204,808,969,643.06/309,672
6. Step 6: Final answer
   x = 661,373.87