Finding the Fourth Proportional to 3,918.66, 5,405.56 and 2,425.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.66 : 5,405.56 = 2,425.62 : x
2. Step 2: Convert to fraction form
   3,918.66/5,405.56 = 2,425.62/x
3. Step 3: Cross multiply
   3,918.66x = 5,405.56 × 2,425.62
4. Step 4: Simplify right side
   3,918.66x = 13,111,834.45
5. Step 5: Solve for x
   x = 13,111,834.45/3,918.66
6. Step 6: Final answer
   x = 3,346.00