Finding the Fourth Proportional to 4,231.86, 6,348.17 and 1,111.87

Step by Step Solution

1. Step 1: Write the proportion equation
   4,231.86 : 6,348.17 = 1,111.87 : x
2. Step 2: Convert to fraction form
   4,231.86/6,348.17 = 1,111.87/x
3. Step 3: Cross multiply
   4,231.86x = 6,348.17 × 1,111.87
4. Step 4: Simplify right side
   4,231.86x = 7,058,339.78
5. Step 5: Solve for x
   x = 7,058,339.78/4,231.86
6. Step 6: Final answer
   x = 1,667.90