Finding the Fourth Proportional to 10,686.89, 16,034.55 and 4,111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.89 : 16,034.55 = 4,111.31 : x
2. Step 2: Convert to fraction form
   10,686.89/16,034.55 = 4,111.31/x
3. Step 3: Cross multiply
   10,686.89x = 16,034.55 × 4,111.31
4. Step 4: Simplify right side
   10,686.89x = 65,922,925.59
5. Step 5: Solve for x
   x = 65,922,925.59/10,686.89
6. Step 6: Final answer
   x = 6,168.58