Finding the Fourth Proportional to 10,123.64, 15,185.81 and 2,728.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.64 : 15,185.81 = 2,728.27 : x
2. Step 2: Convert to fraction form
   10,123.64/15,185.81 = 2,728.27/x
3. Step 3: Cross multiply
   10,123.64x = 15,185.81 × 2,728.27
4. Step 4: Simplify right side
   10,123.64x = 41,431,027.81
5. Step 5: Solve for x
   x = 41,431,027.81/10,123.64
6. Step 6: Final answer
   x = 4,092.50