Finding the Fourth Proportional to 2,922.78, 4,385.79 and 1,191

Step by Step Solution

1. Step 1: Write the proportion equation
   2,922.78 : 4,385.79 = 1,191 : x
2. Step 2: Convert to fraction form
   2,922.78/4,385.79 = 1,191/x
3. Step 3: Cross multiply
   2,922.78x = 4,385.79 × 1,191
4. Step 4: Simplify right side
   2,922.78x = 5,223,475.89
5. Step 5: Solve for x
   x = 5,223,475.89/2,922.78
6. Step 6: Final answer
   x = 1,787.16