Finding the Third Proportional to 317,151 and 691,558.88

Step by Step Solution

1. Step 1: Write the proportion equation
   317,151 : 691,558.88 = 691,558.88 : x
2. Step 2: Convert to fraction form
   317,151/691,558.88 = 691,558.88/x
3. Step 3: Cross multiply
   317,151x = 691,558.88 × 691,558.88
4. Step 4: Simplify right side
   317,151x = 478,253,677,591.27
5. Step 5: Solve for x
   x = 478,253,677,591.27/317,151
6. Step 6: Final answer
   x = 1,507,968.37