Finding the Fourth Proportional to 2,120.58, 3,179.52 and 1,146.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.58 : 3,179.52 = 1,146.42 : x
2. Step 2: Convert to fraction form
   2,120.58/3,179.52 = 1,146.42/x
3. Step 3: Cross multiply
   2,120.58x = 3,179.52 × 1,146.42
4. Step 4: Simplify right side
   2,120.58x = 3,645,065.32
5. Step 5: Solve for x
   x = 3,645,065.32/2,120.58
6. Step 6: Final answer
   x = 1,718.90