Finding the Fourth Proportional to 2,123.30, 3,185.10 and 1,199.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.30 : 3,185.10 = 1,199.29 : x
2. Step 2: Convert to fraction form
   2,123.30/3,185.10 = 1,199.29/x
3. Step 3: Cross multiply
   2,123.30x = 3,185.10 × 1,199.29
4. Step 4: Simplify right side
   2,123.30x = 3,819,858.58
5. Step 5: Solve for x
   x = 3,819,858.58/2,123.30
6. Step 6: Final answer
   x = 1,799.02