Finding the Fourth Proportional to 5,112.81, 7,056.12 and 2,875.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112.81 : 7,056.12 = 2,875.25 : x
2. Step 2: Convert to fraction form
   5,112.81/7,056.12 = 2,875.25/x
3. Step 3: Cross multiply
   5,112.81x = 7,056.12 × 2,875.25
4. Step 4: Simplify right side
   5,112.81x = 20,288,073.75
5. Step 5: Solve for x
   x = 20,288,073.75/5,112.81
6. Step 6: Final answer
   x = 3,968.09