Finding the Third Proportional to 147,158.25 and 317,838

Step by Step Solution

1. Step 1: Write the proportion equation
   147,158.25 : 317,838 = 317,838 : x
2. Step 2: Convert to fraction form
   147,158.25/317,838 = 317,838/x
3. Step 3: Cross multiply
   147,158.25x = 317,838 × 317,838
4. Step 4: Simplify right side
   147,158.25x = 101,020,994,244
5. Step 5: Solve for x
   x = 101,020,994,244/147,158.25
6. Step 6: Final answer
   x = 686,478.63