Finding the Fourth Proportional to 2,116.52, 2,920.56 and 1,172.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.52 : 2,920.56 = 1,172.33 : x
2. Step 2: Convert to fraction form
   2,116.52/2,920.56 = 1,172.33/x
3. Step 3: Cross multiply
   2,116.52x = 2,920.56 × 1,172.33
4. Step 4: Simplify right side
   2,116.52x = 3,423,860.10
5. Step 5: Solve for x
   x = 3,423,860.10/2,116.52
6. Step 6: Final answer
   x = 1,617.68