Finding the Fourth Proportional to 11,913.99, 17,875.86 and 4,128.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,913.99 : 17,875.86 = 4,128.27 : x
2. Step 2: Convert to fraction form
   11,913.99/17,875.86 = 4,128.27/x
3. Step 3: Cross multiply
   11,913.99x = 17,875.86 × 4,128.27
4. Step 4: Simplify right side
   11,913.99x = 73,796,376.56
5. Step 5: Solve for x
   x = 73,796,376.56/11,913.99
6. Step 6: Final answer
   x = 6,194.09