Finding the Fourth Proportional to 13,128.54, 19,696.05 and 3,894.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.54 : 19,696.05 = 3,894.54 : x
2. Step 2: Convert to fraction form
   13,128.54/19,696.05 = 3,894.54/x
3. Step 3: Cross multiply
   13,128.54x = 19,696.05 × 3,894.54
4. Step 4: Simplify right side
   13,128.54x = 76,707,054.57
5. Step 5: Solve for x
   x = 76,707,054.57/13,128.54
6. Step 6: Final answer
   x = 5,842.77