Finding the Fourth Proportional to 2,111.88, 2,914.27 and 1,167.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.88 : 2,914.27 = 1,167.61 : x
2. Step 2: Convert to fraction form
   2,111.88/2,914.27 = 1,167.61/x
3. Step 3: Cross multiply
   2,111.88x = 2,914.27 × 1,167.61
4. Step 4: Simplify right side
   2,111.88x = 3,402,746.10
5. Step 5: Solve for x
   x = 3,402,746.10/2,111.88
6. Step 6: Final answer
   x = 1,611.24