Finding the Fourth Proportional to 14,281.89, 21,420.72 and 5,515.71

Step by Step Solution

1. Step 1: Write the proportion equation
   14,281.89 : 21,420.72 = 5,515.71 : x
2. Step 2: Convert to fraction form
   14,281.89/21,420.72 = 5,515.71/x
3. Step 3: Cross multiply
   14,281.89x = 21,420.72 × 5,515.71
4. Step 4: Simplify right side
   14,281.89x = 118,150,479.51
5. Step 5: Solve for x
   x = 118,150,479.51/14,281.89
6. Step 6: Final answer
   x = 8,272.75