Finding the Fourth Proportional to 20,228.86, 27,928.80 and 13,061.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,228.86 : 27,928.80 = 13,061.98 : x
2. Step 2: Convert to fraction form
   20,228.86/27,928.80 = 13,061.98/x
3. Step 3: Cross multiply
   20,228.86x = 27,928.80 × 13,061.98
4. Step 4: Simplify right side
   20,228.86x = 364,805,461.94
5. Step 5: Solve for x
   x = 364,805,461.94/20,228.86
6. Step 6: Final answer
   x = 18,033.91