Finding the Fourth Proportional to 2,116.88, 2,921.43 and 1,185.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.88 : 2,921.43 = 1,185.38 : x
2. Step 2: Convert to fraction form
   2,116.88/2,921.43 = 1,185.38/x
3. Step 3: Cross multiply
   2,116.88x = 2,921.43 × 1,185.38
4. Step 4: Simplify right side
   2,116.88x = 3,462,990.09
5. Step 5: Solve for x
   x = 3,462,990.09/2,116.88
6. Step 6: Final answer
   x = 1,635.90