Finding the Third Proportional to 413,248.50 and 638,574

Step by Step Solution

1. Step 1: Write the proportion equation
   413,248.50 : 638,574 = 638,574 : x
2. Step 2: Convert to fraction form
   413,248.50/638,574 = 638,574/x
3. Step 3: Cross multiply
   413,248.50x = 638,574 × 638,574
4. Step 4: Simplify right side
   413,248.50x = 407,776,753,476
5. Step 5: Solve for x
   x = 407,776,753,476/413,248.50
6. Step 6: Final answer
   x = 986,759.19