Finding the Fourth Proportional to 19,145.75, 28,726.79 and 8,054.91

Step by Step Solution

1. Step 1: Write the proportion equation
   19,145.75 : 28,726.79 = 8,054.91 : x
2. Step 2: Convert to fraction form
   19,145.75/28,726.79 = 8,054.91/x
3. Step 3: Cross multiply
   19,145.75x = 28,726.79 × 8,054.91
4. Step 4: Simplify right side
   19,145.75x = 231,391,667.76
5. Step 5: Solve for x
   x = 231,391,667.76/19,145.75
6. Step 6: Final answer
   x = 12,085.80