Finding the Fourth Proportional to 10,428.07, 15,648.14 and 3,858.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.07 : 15,648.14 = 3,858.79 : x
2. Step 2: Convert to fraction form
   10,428.07/15,648.14 = 3,858.79/x
3. Step 3: Cross multiply
   10,428.07x = 15,648.14 × 3,858.79
4. Step 4: Simplify right side
   10,428.07x = 60,382,886.15
5. Step 5: Solve for x
   x = 60,382,886.15/10,428.07
6. Step 6: Final answer
   x = 5,790.42