Finding the Fourth Proportional to 2,111.90, 2,914.41 and 1,167.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.90 : 2,914.41 = 1,167.68 : x
2. Step 2: Convert to fraction form
   2,111.90/2,914.41 = 1,167.68/x
3. Step 3: Cross multiply
   2,111.90x = 2,914.41 × 1,167.68
4. Step 4: Simplify right side
   2,111.90x = 3,403,098.27
5. Step 5: Solve for x
   x = 3,403,098.27/2,111.90
6. Step 6: Final answer
   x = 1,611.39