Finding the Fourth Proportional to 11,153.91, 15,395.84 and 7,175.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,153.91 : 15,395.84 = 7,175.03 : x
2. Step 2: Convert to fraction form
   11,153.91/15,395.84 = 7,175.03/x
3. Step 3: Cross multiply
   11,153.91x = 15,395.84 × 7,175.03
4. Step 4: Simplify right side
   11,153.91x = 110,465,554.83
5. Step 5: Solve for x
   x = 110,465,554.83/11,153.91
6. Step 6: Final answer
   x = 9,903.75