Finding the Third Proportional to 314,154 and 678,131.25

Step by Step Solution

1. Step 1: Write the proportion equation
   314,154 : 678,131.25 = 678,131.25 : x
2. Step 2: Convert to fraction form
   314,154/678,131.25 = 678,131.25/x
3. Step 3: Cross multiply
   314,154x = 678,131.25 × 678,131.25
4. Step 4: Simplify right side
   314,154x = 459,861,992,226.56
5. Step 5: Solve for x
   x = 459,861,992,226.56/314,154
6. Step 6: Final answer
   x = 1,463,810.72