Finding the Fourth Proportional to 10,761.91, 16,139.79 and 4,186.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,761.91 : 16,139.79 = 4,186.56 : x
2. Step 2: Convert to fraction form
   10,761.91/16,139.79 = 4,186.56/x
3. Step 3: Cross multiply
   10,761.91x = 16,139.79 × 4,186.56
4. Step 4: Simplify right side
   10,761.91x = 67,570,097.59
5. Step 5: Solve for x
   x = 67,570,097.59/10,761.91
6. Step 6: Final answer
   x = 6,278.64