Finding the Third Proportional to 317,099.81 and 491,103

Step by Step Solution

1. Step 1: Write the proportion equation
   317,099.81 : 491,103 = 491,103 : x
2. Step 2: Convert to fraction form
   317,099.81/491,103 = 491,103/x
3. Step 3: Cross multiply
   317,099.81x = 491,103 × 491,103
4. Step 4: Simplify right side
   317,099.81x = 241,182,156,609
5. Step 5: Solve for x
   x = 241,182,156,609/317,099.81
6. Step 6: Final answer
   x = 760,587.51