Finding the Fourth Proportional to 5,142.30, 7,713.18 and 2,804.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,142.30 : 7,713.18 = 2,804.10 : x
2. Step 2: Convert to fraction form
   5,142.30/7,713.18 = 2,804.10/x
3. Step 3: Cross multiply
   5,142.30x = 7,713.18 × 2,804.10
4. Step 4: Simplify right side
   5,142.30x = 21,628,528.04
5. Step 5: Solve for x
   x = 21,628,528.04/5,142.30
6. Step 6: Final answer
   x = 4,206.00