Finding the Fourth Proportional to 19,911.50, 27,476.83 and 10,957.28

Step by Step Solution

1. Step 1: Write the proportion equation
   19,911.50 : 27,476.83 = 10,957.28 : x
2. Step 2: Convert to fraction form
   19,911.50/27,476.83 = 10,957.28/x
3. Step 3: Cross multiply
   19,911.50x = 27,476.83 × 10,957.28
4. Step 4: Simplify right side
   19,911.50x = 301,071,165.32
5. Step 5: Solve for x
   x = 301,071,165.32/19,911.50
6. Step 6: Final answer
   x = 15,120.46