Finding the Fourth Proportional to 1,617,059, 2,425,578.78 and 418,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617,059 : 2,425,578.78 = 418,978.28 : x
2. Step 2: Convert to fraction form
   1,617,059/2,425,578.78 = 418,978.28/x
3. Step 3: Cross multiply
   1,617,059x = 2,425,578.78 × 418,978.28
4. Step 4: Simplify right side
   1,617,059x = 1,016,264,825,248.90
5. Step 5: Solve for x
   x = 1,016,264,825,248.90/1,617,059
6. Step 6: Final answer
   x = 628,464.90