Finding the Fourth Proportional to 2,008,012.56, 3,012,428.44 and 678,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,008,012.56 : 3,012,428.44 = 678,287.12 : x
2. Step 2: Convert to fraction form
   2,008,012.56/3,012,428.44 = 678,287.12/x
3. Step 3: Cross multiply
   2,008,012.56x = 3,012,428.44 × 678,287.12
4. Step 4: Simplify right side
   2,008,012.56x = 2,043,291,410,773.69
5. Step 5: Solve for x
   x = 2,043,291,410,773.69/2,008,012.56
6. Step 6: Final answer
   x = 1,017,569.04