Finding the Fourth Proportional to 8,111.07, 12,171.41 and 3,430.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.07 : 12,171.41 = 3,430.83 : x
2. Step 2: Convert to fraction form
   8,111.07/12,171.41 = 3,430.83/x
3. Step 3: Cross multiply
   8,111.07x = 12,171.41 × 3,430.83
4. Step 4: Simplify right side
   8,111.07x = 41,758,038.57
5. Step 5: Solve for x
   x = 41,758,038.57/8,111.07
6. Step 6: Final answer
   x = 5,148.28