Finding the Fourth Proportional to 21,074.86, 29,080.83 and 11,642.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,074.86 : 29,080.83 = 11,642.86 : x
2. Step 2: Convert to fraction form
   21,074.86/29,080.83 = 11,642.86/x
3. Step 3: Cross multiply
   21,074.86x = 29,080.83 × 11,642.86
4. Step 4: Simplify right side
   21,074.86x = 338,584,032.37
5. Step 5: Solve for x
   x = 338,584,032.37/21,074.86
6. Step 6: Final answer
   x = 16,065.78