Finding the Third Proportional to 316,836 and 659,891.25

Step by Step Solution

1. Step 1: Write the proportion equation
   316,836 : 659,891.25 = 659,891.25 : x
2. Step 2: Convert to fraction form
   316,836/659,891.25 = 659,891.25/x
3. Step 3: Cross multiply
   316,836x = 659,891.25 × 659,891.25
4. Step 4: Simplify right side
   316,836x = 435,456,461,826.56
5. Step 5: Solve for x
   x = 435,456,461,826.56/316,836
6. Step 6: Final answer
   x = 1,374,390.73