Finding the Third Proportional to 150,090 and 317,060

Step by Step Solution

1. Step 1: Write the proportion equation
   150,090 : 317,060 = 317,060 : x
2. Step 2: Convert to fraction form
   150,090/317,060 = 317,060/x
3. Step 3: Cross multiply
   150,090x = 317,060 × 317,060
4. Step 4: Simplify right side
   150,090x = 100,527,043,600
5. Step 5: Solve for x
   x = 100,527,043,600/150,090
6. Step 6: Final answer
   x = 669,778.42