Finding the Fourth Proportional to 21,440.61, 32,159.91 and 5,858.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,440.61 : 32,159.91 = 5,858.28 : x
2. Step 2: Convert to fraction form
   21,440.61/32,159.91 = 5,858.28/x
3. Step 3: Cross multiply
   21,440.61x = 32,159.91 × 5,858.28
4. Step 4: Simplify right side
   21,440.61x = 188,401,757.55
5. Step 5: Solve for x
   x = 188,401,757.55/21,440.61
6. Step 6: Final answer
   x = 8,787.15