Finding the Fourth Proportional to 8,443.34, 12,654.06 and 3,439.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.34 : 12,654.06 = 3,439.90 : x
2. Step 2: Convert to fraction form
   8,443.34/12,654.06 = 3,439.90/x
3. Step 3: Cross multiply
   8,443.34x = 12,654.06 × 3,439.90
4. Step 4: Simplify right side
   8,443.34x = 43,528,665.04
5. Step 5: Solve for x
   x = 43,528,665.04/8,443.34
6. Step 6: Final answer
   x = 5,155.38