Finding the Fourth Proportional to 9,870.39, 14,806.49 and 2,850.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.39 : 14,806.49 = 2,850.31 : x
2. Step 2: Convert to fraction form
   9,870.39/14,806.49 = 2,850.31/x
3. Step 3: Cross multiply
   9,870.39x = 14,806.49 × 2,850.31
4. Step 4: Simplify right side
   9,870.39x = 42,203,086.51
5. Step 5: Solve for x
   x = 42,203,086.51/9,870.39
6. Step 6: Final answer
   x = 4,275.73