Finding the Fourth Proportional to 5,612.21, 8,405.86 and 3,631.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,612.21 : 8,405.86 = 3,631.47 : x
2. Step 2: Convert to fraction form
   5,612.21/8,405.86 = 3,631.47/x
3. Step 3: Cross multiply
   5,612.21x = 8,405.86 × 3,631.47
4. Step 4: Simplify right side
   5,612.21x = 30,525,628.41
5. Step 5: Solve for x
   x = 30,525,628.41/5,612.21
6. Step 6: Final answer
   x = 5,439.15