Finding the Fourth Proportional to 3,922.81, 5,411.47 and 2,505.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,922.81 : 5,411.47 = 2,505.01 : x
2. Step 2: Convert to fraction form
   3,922.81/5,411.47 = 2,505.01/x
3. Step 3: Cross multiply
   3,922.81x = 5,411.47 × 2,505.01
4. Step 4: Simplify right side
   3,922.81x = 13,555,773.62
5. Step 5: Solve for x
   x = 13,555,773.62/3,922.81
6. Step 6: Final answer
   x = 3,455.63