Finding the Fourth Proportional to 13,256.48, 19,879.84 and 3,894.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.48 : 19,879.84 = 3,894.09 : x
2. Step 2: Convert to fraction form
   13,256.48/19,879.84 = 3,894.09/x
3. Step 3: Cross multiply
   13,256.48x = 19,879.84 × 3,894.09
4. Step 4: Simplify right side
   13,256.48x = 77,413,886.15
5. Step 5: Solve for x
   x = 77,413,886.15/13,256.48
6. Step 6: Final answer
   x = 5,839.70