Finding the Fourth Proportional to 19,828.77, 27,356.17 and 12,658.96

Step by Step Solution

1. Step 1: Write the proportion equation
   19,828.77 : 27,356.17 = 12,658.96 : x
2. Step 2: Convert to fraction form
   19,828.77/27,356.17 = 12,658.96/x
3. Step 3: Cross multiply
   19,828.77x = 27,356.17 × 12,658.96
4. Step 4: Simplify right side
   19,828.77x = 346,300,661.78
5. Step 5: Solve for x
   x = 346,300,661.78/19,828.77
6. Step 6: Final answer
   x = 17,464.56