Finding the Fourth Proportional to 6,388.63, 8,816.59 and 3,556.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,388.63 : 8,816.59 = 3,556.18 : x
2. Step 2: Convert to fraction form
   6,388.63/8,816.59 = 3,556.18/x
3. Step 3: Cross multiply
   6,388.63x = 8,816.59 × 3,556.18
4. Step 4: Simplify right side
   6,388.63x = 31,353,385.23
5. Step 5: Solve for x
   x = 31,353,385.23/6,388.63
6. Step 6: Final answer
   x = 4,907.69