Finding the Fourth Proportional to 5,401.47, 8,099.33 and 4,778.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.47 : 8,099.33 = 4,778.31 : x
2. Step 2: Convert to fraction form
   5,401.47/8,099.33 = 4,778.31/x
3. Step 3: Cross multiply
   5,401.47x = 8,099.33 × 4,778.31
4. Step 4: Simplify right side
   5,401.47x = 38,701,085.64
5. Step 5: Solve for x
   x = 38,701,085.64/5,401.47
6. Step 6: Final answer
   x = 7,164.92