Finding the Fourth Proportional to 13,056.36, 18,016.56 and 7,391.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,056.36 : 18,016.56 = 7,391.63 : x
2. Step 2: Convert to fraction form
   13,056.36/18,016.56 = 7,391.63/x
3. Step 3: Cross multiply
   13,056.36x = 18,016.56 × 7,391.63
4. Step 4: Simplify right side
   13,056.36x = 133,171,655.31
5. Step 5: Solve for x
   x = 133,171,655.31/13,056.36
6. Step 6: Final answer
   x = 10,199.75