Finding the Fourth Proportional to 2,123, 2,929.86 and 1,191.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123 : 2,929.86 = 1,191.56 : x
2. Step 2: Convert to fraction form
   2,123/2,929.86 = 1,191.56/x
3. Step 3: Cross multiply
   2,123x = 2,929.86 × 1,191.56
4. Step 4: Simplify right side
   2,123x = 3,491,103.98
5. Step 5: Solve for x
   x = 3,491,103.98/2,123
6. Step 6: Final answer
   x = 1,644.42