Finding the Third Proportional to 303,547.50 and 438,540

Step by Step Solution

1. Step 1: Write the proportion equation
   303,547.50 : 438,540 = 438,540 : x
2. Step 2: Convert to fraction form
   303,547.50/438,540 = 438,540/x
3. Step 3: Cross multiply
   303,547.50x = 438,540 × 438,540
4. Step 4: Simplify right side
   303,547.50x = 192,317,331,600
5. Step 5: Solve for x
   x = 192,317,331,600/303,547.50
6. Step 6: Final answer
   x = 633,565.86