Finding the Fourth Proportional to 5,411.98, 8,118.51 and 2,491.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.98 : 8,118.51 = 2,491.12 : x
2. Step 2: Convert to fraction form
   5,411.98/8,118.51 = 2,491.12/x
3. Step 3: Cross multiply
   5,411.98x = 8,118.51 × 2,491.12
4. Step 4: Simplify right side
   5,411.98x = 20,224,182.63
5. Step 5: Solve for x
   x = 20,224,182.63/5,411.98
6. Step 6: Final answer
   x = 3,736.93