Finding the Fourth Proportional to 2,129.57, 2,938.49 and 1,185.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.57 : 2,938.49 = 1,185.38 : x
2. Step 2: Convert to fraction form
   2,129.57/2,938.49 = 1,185.38/x
3. Step 3: Cross multiply
   2,129.57x = 2,938.49 × 1,185.38
4. Step 4: Simplify right side
   2,129.57x = 3,483,235.32
5. Step 5: Solve for x
   x = 3,483,235.32/2,129.57
6. Step 6: Final answer
   x = 1,635.65