Finding the Fourth Proportional to 3,191.81, 4,789.90 and 1,111.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,191.81 : 4,789.90 = 1,111.82 : x
2. Step 2: Convert to fraction form
   3,191.81/4,789.90 = 1,111.82/x
3. Step 3: Cross multiply
   3,191.81x = 4,789.90 × 1,111.82
4. Step 4: Simplify right side
   3,191.81x = 5,325,484.06
5. Step 5: Solve for x
   x = 5,325,484.06/3,191.81
6. Step 6: Final answer
   x = 1,668.48