Finding the Fourth Proportional to 3,261.17, 4,890.72 and 1,069.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,261.17 : 4,890.72 = 1,069.39 : x
2. Step 2: Convert to fraction form
   3,261.17/4,890.72 = 1,069.39/x
3. Step 3: Cross multiply
   3,261.17x = 4,890.72 × 1,069.39
4. Step 4: Simplify right side
   3,261.17x = 5,230,069.67
5. Step 5: Solve for x
   x = 5,230,069.67/3,261.17
6. Step 6: Final answer
   x = 1,603.74