Finding the Fourth Proportional to 3,419.50, 5,129.97 and 1,111.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.50 : 5,129.97 = 1,111.18 : x
2. Step 2: Convert to fraction form
   3,419.50/5,129.97 = 1,111.18/x
3. Step 3: Cross multiply
   3,419.50x = 5,129.97 × 1,111.18
4. Step 4: Simplify right side
   3,419.50x = 5,700,320.06
5. Step 5: Solve for x
   x = 5,700,320.06/3,419.50
6. Step 6: Final answer
   x = 1,667.00