Finding the Fourth Proportional to 13,018.48, 19,484.92 and 7,086.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.48 : 19,484.92 = 7,086.31 : x
2. Step 2: Convert to fraction form
   13,018.48/19,484.92 = 7,086.31/x
3. Step 3: Cross multiply
   13,018.48x = 19,484.92 × 7,086.31
4. Step 4: Simplify right side
   13,018.48x = 138,076,183.45
5. Step 5: Solve for x
   x = 138,076,183.45/13,018.48
6. Step 6: Final answer
   x = 10,606.17