Finding the Fourth Proportional to 2,385.38, 3,578.91 and 1,069.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.38 : 3,578.91 = 1,069.02 : x
2. Step 2: Convert to fraction form
   2,385.38/3,578.91 = 1,069.02/x
3. Step 3: Cross multiply
   2,385.38x = 3,578.91 × 1,069.02
4. Step 4: Simplify right side
   2,385.38x = 3,825,926.37
5. Step 5: Solve for x
   x = 3,825,926.37/2,385.38
6. Step 6: Final answer
   x = 1,603.91