Finding the Fourth Proportional to 2,111.78, 3,167.66 and 1,175.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.78 : 3,167.66 = 1,175.30 : x
2. Step 2: Convert to fraction form
   2,111.78/3,167.66 = 1,175.30/x
3. Step 3: Cross multiply
   2,111.78x = 3,167.66 × 1,175.30
4. Step 4: Simplify right side
   2,111.78x = 3,722,950.80
5. Step 5: Solve for x
   x = 3,722,950.80/2,111.78
6. Step 6: Final answer
   x = 1,762.94