Finding the Fourth Proportional to 2,151.97, 3,225.36 and 1,111.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.97 : 3,225.36 = 1,111.40 : x
2. Step 2: Convert to fraction form
   2,151.97/3,225.36 = 1,111.40/x
3. Step 3: Cross multiply
   2,151.97x = 3,225.36 × 1,111.40
4. Step 4: Simplify right side
   2,151.97x = 3,584,680.26
5. Step 5: Solve for x
   x = 3,584,680.26/2,151.97
6. Step 6: Final answer
   x = 1,665.77