Finding the Fourth Proportional to 21,421.88, 32,129.52 and 5,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,421.88 : 32,129.52 = 5,840.72 : x
2. Step 2: Convert to fraction form
   21,421.88/32,129.52 = 5,840.72/x
3. Step 3: Cross multiply
   21,421.88x = 32,129.52 × 5,840.72
4. Step 4: Simplify right side
   21,421.88x = 187,659,530.05
5. Step 5: Solve for x
   x = 187,659,530.05/21,421.88
6. Step 6: Final answer
   x = 8,760.18