Finding the Fourth Proportional to 2,578.95, 3,868.32 and 1,191.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.95 : 3,868.32 = 1,191.83 : x
2. Step 2: Convert to fraction form
   2,578.95/3,868.32 = 1,191.83/x
3. Step 3: Cross multiply
   2,578.95x = 3,868.32 × 1,191.83
4. Step 4: Simplify right side
   2,578.95x = 4,610,379.83
5. Step 5: Solve for x
   x = 4,610,379.83/2,578.95
6. Step 6: Final answer
   x = 1,787.70