Finding the Fourth Proportional to 2,188.12, 3,269.37 and 2,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.12 : 3,269.37 = 2,111.56 : x
2. Step 2: Convert to fraction form
   2,188.12/3,269.37 = 2,111.56/x
3. Step 3: Cross multiply
   2,188.12x = 3,269.37 × 2,111.56
4. Step 4: Simplify right side
   2,188.12x = 6,903,465.64
5. Step 5: Solve for x
   x = 6,903,465.64/2,188.12
6. Step 6: Final answer
   x = 3,154.98