Finding the Fourth Proportional to 2,111.33, 3,159.04 and 1,263.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.33 : 3,159.04 = 1,263.89 : x
2. Step 2: Convert to fraction form
   2,111.33/3,159.04 = 1,263.89/x
3. Step 3: Cross multiply
   2,111.33x = 3,159.04 × 1,263.89
4. Step 4: Simplify right side
   2,111.33x = 3,992,679.07
5. Step 5: Solve for x
   x = 3,992,679.07/2,111.33
6. Step 6: Final answer
   x = 1,891.07