Finding the Fourth Proportional to 3,891.34, 5,838.15 and 1,812.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,891.34 : 5,838.15 = 1,812.56 : x
2. Step 2: Convert to fraction form
   3,891.34/5,838.15 = 1,812.56/x
3. Step 3: Cross multiply
   3,891.34x = 5,838.15 × 1,812.56
4. Step 4: Simplify right side
   3,891.34x = 10,581,997.16
5. Step 5: Solve for x
   x = 10,581,997.16/3,891.34
6. Step 6: Final answer
   x = 2,719.37