Finding the Fourth Proportional to 10,644.71, 14,690.86 and 5,865.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,644.71 : 14,690.86 = 5,865.15 : x
2. Step 2: Convert to fraction form
   10,644.71/14,690.86 = 5,865.15/x
3. Step 3: Cross multiply
   10,644.71x = 14,690.86 × 5,865.15
4. Step 4: Simplify right side
   10,644.71x = 86,164,020.44
5. Step 5: Solve for x
   x = 86,164,020.44/10,644.71
6. Step 6: Final answer
   x = 8,094.54