Finding the Fourth Proportional to 11,427.57, 15,759.78 and 7,179.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,427.57 : 15,759.78 = 7,179.03 : x
2. Step 2: Convert to fraction form
   11,427.57/15,759.78 = 7,179.03/x
3. Step 3: Cross multiply
   11,427.57x = 15,759.78 × 7,179.03
4. Step 4: Simplify right side
   11,427.57x = 113,139,933.41
5. Step 5: Solve for x
   x = 113,139,933.41/11,427.57
6. Step 6: Final answer
   x = 9,900.61