Finding the Third Proportional to 317,129.50 and 434,870

Step by Step Solution

1. Step 1: Write the proportion equation
   317,129.50 : 434,870 = 434,870 : x
2. Step 2: Convert to fraction form
   317,129.50/434,870 = 434,870/x
3. Step 3: Cross multiply
   317,129.50x = 434,870 × 434,870
4. Step 4: Simplify right side
   317,129.50x = 189,111,916,900
5. Step 5: Solve for x
   x = 189,111,916,900/317,129.50
6. Step 6: Final answer
   x = 596,323.95