Finding the Fourth Proportional to 19,911.16, 27,476.72 and 10,958.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,911.16 : 27,476.72 = 10,958.60 : x
2. Step 2: Convert to fraction form
   19,911.16/27,476.72 = 10,958.60/x
3. Step 3: Cross multiply
   19,911.16x = 27,476.72 × 10,958.60
4. Step 4: Simplify right side
   19,911.16x = 301,106,383.79
5. Step 5: Solve for x
   x = 301,106,383.79/19,911.16
6. Step 6: Final answer
   x = 15,122.49