Finding the Fourth Proportional to 5,411.51, 8,111.10 and 2,289.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.51 : 8,111.10 = 2,289.56 : x
2. Step 2: Convert to fraction form
   5,411.51/8,111.10 = 2,289.56/x
3. Step 3: Cross multiply
   5,411.51x = 8,111.10 × 2,289.56
4. Step 4: Simplify right side
   5,411.51x = 18,570,870.39
5. Step 5: Solve for x
   x = 18,570,870.39/5,411.51
6. Step 6: Final answer
   x = 3,431.74