Finding the Fourth Proportional to 2,123.12, 2,930.04 and 1,191.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.12 : 2,930.04 = 1,191.68 : x
2. Step 2: Convert to fraction form
   2,123.12/2,930.04 = 1,191.68/x
3. Step 3: Cross multiply
   2,123.12x = 2,930.04 × 1,191.68
4. Step 4: Simplify right side
   2,123.12x = 3,491,670.07
5. Step 5: Solve for x
   x = 3,491,670.07/2,123.12
6. Step 6: Final answer
   x = 1,644.59