Finding the Fourth Proportional to 11,940.72, 17,911.98 and 3,175.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,940.72 : 17,911.98 = 3,175.38 : x
2. Step 2: Convert to fraction form
   11,940.72/17,911.98 = 3,175.38/x
3. Step 3: Cross multiply
   11,940.72x = 17,911.98 × 3,175.38
4. Step 4: Simplify right side
   11,940.72x = 56,877,343.05
5. Step 5: Solve for x
   x = 56,877,343.05/11,940.72
6. Step 6: Final answer
   x = 4,763.31