Finding the Fourth Proportional to 2,111.81, 2,914.25 and 1,167.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.81 : 2,914.25 = 1,167.56 : x
2. Step 2: Convert to fraction form
   2,111.81/2,914.25 = 1,167.56/x
3. Step 3: Cross multiply
   2,111.81x = 2,914.25 × 1,167.56
4. Step 4: Simplify right side
   2,111.81x = 3,402,561.73
5. Step 5: Solve for x
   x = 3,402,561.73/2,111.81
6. Step 6: Final answer
   x = 1,611.21