Finding the Fourth Proportional to 2,116.57, 2,920.83 and 1,185.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.57 : 2,920.83 = 1,185.07 : x
2. Step 2: Convert to fraction form
   2,116.57/2,920.83 = 1,185.07/x
3. Step 3: Cross multiply
   2,116.57x = 2,920.83 × 1,185.07
4. Step 4: Simplify right side
   2,116.57x = 3,461,388.01
5. Step 5: Solve for x
   x = 3,461,388.01/2,116.57
6. Step 6: Final answer
   x = 1,635.38