Finding the Fourth Proportional to 3,932.72, 5,427.40 and 2,164.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932.72 : 5,427.40 = 2,164.48 : x
2. Step 2: Convert to fraction form
   3,932.72/5,427.40 = 2,164.48/x
3. Step 3: Cross multiply
   3,932.72x = 5,427.40 × 2,164.48
4. Step 4: Simplify right side
   3,932.72x = 11,747,498.75
5. Step 5: Solve for x
   x = 11,747,498.75/3,932.72
6. Step 6: Final answer
   x = 2,987.12