Finding the Fourth Proportional to 3,930.48, 5,426.31 and 2,605.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.48 : 5,426.31 = 2,605.98 : x
2. Step 2: Convert to fraction form
   3,930.48/5,426.31 = 2,605.98/x
3. Step 3: Cross multiply
   3,930.48x = 5,426.31 × 2,605.98
4. Step 4: Simplify right side
   3,930.48x = 14,140,855.33
5. Step 5: Solve for x
   x = 14,140,855.33/3,930.48
6. Step 6: Final answer
   x = 3,597.74