Finding the Fourth Proportional to 2,189.02, 3,260.31 and 2,178.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.02 : 3,260.31 = 2,178.42 : x
2. Step 2: Convert to fraction form
   2,189.02/3,260.31 = 2,178.42/x
3. Step 3: Cross multiply
   2,189.02x = 3,260.31 × 2,178.42
4. Step 4: Simplify right side
   2,189.02x = 7,102,324.51
5. Step 5: Solve for x
   x = 7,102,324.51/2,189.02
6. Step 6: Final answer
   x = 3,244.52