Finding the Fourth Proportional to 10,128.43, 15,182.22 and 3,886.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.43 : 15,182.22 = 3,886.78 : x
2. Step 2: Convert to fraction form
   10,128.43/15,182.22 = 3,886.78/x
3. Step 3: Cross multiply
   10,128.43x = 15,182.22 × 3,886.78
4. Step 4: Simplify right side
   10,128.43x = 59,009,896.52
5. Step 5: Solve for x
   x = 59,009,896.52/10,128.43
6. Step 6: Final answer
   x = 5,826.17