Finding the Third Proportional to 387,010.50 and 821,043

Step by Step Solution

1. Step 1: Write the proportion equation
   387,010.50 : 821,043 = 821,043 : x
2. Step 2: Convert to fraction form
   387,010.50/821,043 = 821,043/x
3. Step 3: Cross multiply
   387,010.50x = 821,043 × 821,043
4. Step 4: Simplify right side
   387,010.50x = 674,111,607,849
5. Step 5: Solve for x
   x = 674,111,607,849/387,010.50
6. Step 6: Final answer
   x = 1,741,843.20