Finding the Fourth Proportional to 12,999.15, 19,464.71 and 10,079.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999.15 : 19,464.71 = 10,079.91 : x
2. Step 2: Convert to fraction form
   12,999.15/19,464.71 = 10,079.91/x
3. Step 3: Cross multiply
   12,999.15x = 19,464.71 × 10,079.91
4. Step 4: Simplify right side
   12,999.15x = 196,202,474.58
5. Step 5: Solve for x
   x = 196,202,474.58/12,999.15
6. Step 6: Final answer
   x = 15,093.48