Finding the Fourth Proportional to 2,116.76, 2,921.12 and 1,185.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.76 : 2,921.12 = 1,185.26 : x
2. Step 2: Convert to fraction form
   2,116.76/2,921.12 = 1,185.26/x
3. Step 3: Cross multiply
   2,116.76x = 2,921.12 × 1,185.26
4. Step 4: Simplify right side
   2,116.76x = 3,462,286.69
5. Step 5: Solve for x
   x = 3,462,286.69/2,116.76
6. Step 6: Final answer
   x = 1,635.65