Finding the Fourth Proportional to 10,128.38, 15,199.32 and 3,893.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.38 : 15,199.32 = 3,893.54 : x
2. Step 2: Convert to fraction form
   10,128.38/15,199.32 = 3,893.54/x
3. Step 3: Cross multiply
   10,128.38x = 15,199.32 × 3,893.54
4. Step 4: Simplify right side
   10,128.38x = 59,179,064.93
5. Step 5: Solve for x
   x = 59,179,064.93/10,128.38
6. Step 6: Final answer
   x = 5,842.90