Finding the Fourth Proportional to 2,215.72, 3,324.54 and 1,188.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.72 : 3,324.54 = 1,188.52 : x
2. Step 2: Convert to fraction form
   2,215.72/3,324.54 = 1,188.52/x
3. Step 3: Cross multiply
   2,215.72x = 3,324.54 × 1,188.52
4. Step 4: Simplify right side
   2,215.72x = 3,951,282.28
5. Step 5: Solve for x
   x = 3,951,282.28/2,215.72
6. Step 6: Final answer
   x = 1,783.29