Finding the Fourth Proportional to 1,069,578.18, 1,603,287.59 and 670,499.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069,578.18 : 1,603,287.59 = 670,499.28 : x
2. Step 2: Convert to fraction form
   1,069,578.18/1,603,287.59 = 670,499.28/x
3. Step 3: Cross multiply
   1,069,578.18x = 1,603,287.59 × 670,499.28
4. Step 4: Simplify right side
   1,069,578.18x = 1,075,003,171,375.44
5. Step 5: Solve for x
   x = 1,075,003,171,375.44/1,069,578.18
6. Step 6: Final answer
   x = 1,005,072.08