Finding the Fourth Proportional to 2,111.25, 2,913.53 and 1,167.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.25 : 2,913.53 = 1,167.05 : x
2. Step 2: Convert to fraction form
   2,111.25/2,913.53 = 1,167.05/x
3. Step 3: Cross multiply
   2,111.25x = 2,913.53 × 1,167.05
4. Step 4: Simplify right side
   2,111.25x = 3,400,217.70
5. Step 5: Solve for x
   x = 3,400,217.70/2,111.25
6. Step 6: Final answer
   x = 1,610.52