Finding the Fourth Proportional to 12,321.32, 18,483.80 and 3,556.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.32 : 18,483.80 = 3,556.31 : x
2. Step 2: Convert to fraction form
   12,321.32/18,483.80 = 3,556.31/x
3. Step 3: Cross multiply
   12,321.32x = 18,483.80 × 3,556.31
4. Step 4: Simplify right side
   12,321.32x = 65,734,012.58
5. Step 5: Solve for x
   x = 65,734,012.58/12,321.32
6. Step 6: Final answer
   x = 5,334.98