Finding the Fourth Proportional to 13,978.16, 19,289.85 and 8,009.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.16 : 19,289.85 = 8,009.54 : x
2. Step 2: Convert to fraction form
   13,978.16/19,289.85 = 8,009.54/x
3. Step 3: Cross multiply
   13,978.16x = 19,289.85 × 8,009.54
4. Step 4: Simplify right side
   13,978.16x = 154,502,825.17
5. Step 5: Solve for x
   x = 154,502,825.17/13,978.16
6. Step 6: Final answer
   x = 11,053.16