Finding the Fourth Proportional to 10,123.47, 15,186.72 and 2,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.47 : 15,186.72 = 2,728.50 : x
2. Step 2: Convert to fraction form
   10,123.47/15,186.72 = 2,728.50/x
3. Step 3: Cross multiply
   10,123.47x = 15,186.72 × 2,728.50
4. Step 4: Simplify right side
   10,123.47x = 41,436,965.52
5. Step 5: Solve for x
   x = 41,436,965.52/10,123.47
6. Step 6: Final answer
   x = 4,093.16