Finding the Fourth Proportional to 5,411.37, 8,111.52 and 2,119.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.37 : 8,111.52 = 2,119.98 : x
2. Step 2: Convert to fraction form
   5,411.37/8,111.52 = 2,119.98/x
3. Step 3: Cross multiply
   5,411.37x = 8,111.52 × 2,119.98
4. Step 4: Simplify right side
   5,411.37x = 17,196,260.17
5. Step 5: Solve for x
   x = 17,196,260.17/5,411.37
6. Step 6: Final answer
   x = 3,177.80