Finding the Fourth Proportional to 10,485.38, 15,730.81 and 3,911.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,485.38 : 15,730.81 = 3,911.63 : x
2. Step 2: Convert to fraction form
   10,485.38/15,730.81 = 3,911.63/x
3. Step 3: Cross multiply
   10,485.38x = 15,730.81 × 3,911.63
4. Step 4: Simplify right side
   10,485.38x = 61,533,019.89
5. Step 5: Solve for x
   x = 61,533,019.89/10,485.38
6. Step 6: Final answer
   x = 5,868.46