Finding the Fourth Proportional to 8,365.45, 12,537.23 and 3,429.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,365.45 : 12,537.23 = 3,429.31 : x
2. Step 2: Convert to fraction form
   8,365.45/12,537.23 = 3,429.31/x
3. Step 3: Cross multiply
   8,365.45x = 12,537.23 × 3,429.31
4. Step 4: Simplify right side
   8,365.45x = 42,994,048.21
5. Step 5: Solve for x
   x = 42,994,048.21/8,365.45
6. Step 6: Final answer
   x = 5,139.48