Finding the Fourth Proportional to 3,578.98, 5,368.80 and 1,113.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.98 : 5,368.80 = 1,113.82 : x
2. Step 2: Convert to fraction form
   3,578.98/5,368.80 = 1,113.82/x
3. Step 3: Cross multiply
   3,578.98x = 5,368.80 × 1,113.82
4. Step 4: Simplify right side
   3,578.98x = 5,979,876.82
5. Step 5: Solve for x
   x = 5,979,876.82/3,578.98
6. Step 6: Final answer
   x = 1,670.83