Finding the Fourth Proportional to 7,870.16, 10,860.94 and 4,285.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.16 : 10,860.94 = 4,285.25 : x
2. Step 2: Convert to fraction form
   7,870.16/10,860.94 = 4,285.25/x
3. Step 3: Cross multiply
   7,870.16x = 10,860.94 × 4,285.25
4. Step 4: Simplify right side
   7,870.16x = 46,541,871.90
5. Step 5: Solve for x
   x = 46,541,871.90/7,870.16
6. Step 6: Final answer
   x = 5,913.71