Finding the Fourth Proportional to 11,735.36, 16,180.72 and 10,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,735.36 : 16,180.72 = 10,139.12 : x
2. Step 2: Convert to fraction form
   11,735.36/16,180.72 = 10,139.12/x
3. Step 3: Cross multiply
   11,735.36x = 16,180.72 × 10,139.12
4. Step 4: Simplify right side
   11,735.36x = 164,058,261.77
5. Step 5: Solve for x
   x = 164,058,261.77/11,735.36
6. Step 6: Final answer
   x = 13,979.82