Finding the Fourth Proportional to 9,368.72, 14,053.55 and 3,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.72 : 14,053.55 = 3,128.48 : x
2. Step 2: Convert to fraction form
   9,368.72/14,053.55 = 3,128.48/x
3. Step 3: Cross multiply
   9,368.72x = 14,053.55 × 3,128.48
4. Step 4: Simplify right side
   9,368.72x = 43,966,250.10
5. Step 5: Solve for x
   x = 43,966,250.10/9,368.72
6. Step 6: Final answer
   x = 4,692.88