Finding the Fourth Proportional to 8,472.56, 12,705.68 and 3,542.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,472.56 : 12,705.68 = 3,542.54 : x
2. Step 2: Convert to fraction form
   8,472.56/12,705.68 = 3,542.54/x
3. Step 3: Cross multiply
   8,472.56x = 12,705.68 × 3,542.54
4. Step 4: Simplify right side
   8,472.56x = 45,010,379.63
5. Step 5: Solve for x
   x = 45,010,379.63/8,472.56
6. Step 6: Final answer
   x = 5,312.49