Finding the Fourth Proportional to 13,251.78, 19,886.76 and 5,460.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,251.78 : 19,886.76 = 5,460.54 : x
2. Step 2: Convert to fraction form
   13,251.78/19,886.76 = 5,460.54/x
3. Step 3: Cross multiply
   13,251.78x = 19,886.76 × 5,460.54
4. Step 4: Simplify right side
   13,251.78x = 108,592,448.45
5. Step 5: Solve for x
   x = 108,592,448.45/13,251.78
6. Step 6: Final answer
   x = 8,194.56