Finding the Fourth Proportional to 10,979.93, 15,147.06 and 10,555.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,979.93 : 15,147.06 = 10,555.58 : x
2. Step 2: Convert to fraction form
   10,979.93/15,147.06 = 10,555.58/x
3. Step 3: Cross multiply
   10,979.93x = 15,147.06 × 10,555.58
4. Step 4: Simplify right side
   10,979.93x = 159,886,003.59
5. Step 5: Solve for x
   x = 159,886,003.59/10,979.93
6. Step 6: Final answer
   x = 14,561.66