Finding the Third Proportional to 413,182.50 and 638,457

Step by Step Solution

1. Step 1: Write the proportion equation
   413,182.50 : 638,457 = 638,457 : x
2. Step 2: Convert to fraction form
   413,182.50/638,457 = 638,457/x
3. Step 3: Cross multiply
   413,182.50x = 638,457 × 638,457
4. Step 4: Simplify right side
   413,182.50x = 407,627,340,849
5. Step 5: Solve for x
   x = 407,627,340,849/413,182.50
6. Step 6: Final answer
   x = 986,555.19