Finding the Fourth Proportional to 6,389.42, 8,817.47 and 3,518.47

Step by Step Solution

1. Step 1: Write the proportion equation
   6,389.42 : 8,817.47 = 3,518.47 : x
2. Step 2: Convert to fraction form
   6,389.42/8,817.47 = 3,518.47/x
3. Step 3: Cross multiply
   6,389.42x = 8,817.47 × 3,518.47
4. Step 4: Simplify right side
   6,389.42x = 31,024,003.67
5. Step 5: Solve for x
   x = 31,024,003.67/6,389.42
6. Step 6: Final answer
   x = 4,855.53