Finding the Fourth Proportional to 9,051.42, 13,574.97 and 3,128.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.42 : 13,574.97 = 3,128.51 : x
2. Step 2: Convert to fraction form
   9,051.42/13,574.97 = 3,128.51/x
3. Step 3: Cross multiply
   9,051.42x = 13,574.97 × 3,128.51
4. Step 4: Simplify right side
   9,051.42x = 42,469,435.44
5. Step 5: Solve for x
   x = 42,469,435.44/9,051.42
6. Step 6: Final answer
   x = 4,692.02