Finding the Fourth Proportional to 9,051.71, 13,576.73 and 3,128.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.71 : 13,576.73 = 3,128.05 : x
2. Step 2: Convert to fraction form
   9,051.71/13,576.73 = 3,128.05/x
3. Step 3: Cross multiply
   9,051.71x = 13,576.73 × 3,128.05
4. Step 4: Simplify right side
   9,051.71x = 42,468,640.69
5. Step 5: Solve for x
   x = 42,468,640.69/9,051.71
6. Step 6: Final answer
   x = 4,691.78