Finding the Fourth Proportional to 3,191.17, 4,786.71 and 1,111.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,191.17 : 4,786.71 = 1,111.16 : x
2. Step 2: Convert to fraction form
   3,191.17/4,786.71 = 1,111.16/x
3. Step 3: Cross multiply
   3,191.17x = 4,786.71 × 1,111.16
4. Step 4: Simplify right side
   3,191.17x = 5,318,800.68
5. Step 5: Solve for x
   x = 5,318,800.68/3,191.17
6. Step 6: Final answer
   x = 1,666.73