Finding the Fourth Proportional to 3,578.80, 5,368.83 and 1,113.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.80 : 5,368.83 = 1,113.87 : x
2. Step 2: Convert to fraction form
   3,578.80/5,368.83 = 1,113.87/x
3. Step 3: Cross multiply
   3,578.80x = 5,368.83 × 1,113.87
4. Step 4: Simplify right side
   3,578.80x = 5,980,178.67
5. Step 5: Solve for x
   x = 5,980,178.67/3,578.80
6. Step 6: Final answer
   x = 1,671.00