Finding the Fourth Proportional to 2,135.69, 2,947.27 and 1,191.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,135.69 : 2,947.27 = 1,191.55 : x
2. Step 2: Convert to fraction form
   2,135.69/2,947.27 = 1,191.55/x
3. Step 3: Cross multiply
   2,135.69x = 2,947.27 × 1,191.55
4. Step 4: Simplify right side
   2,135.69x = 3,511,804.83
5. Step 5: Solve for x
   x = 3,511,804.83/2,135.69
6. Step 6: Final answer
   x = 1,644.34