Finding the Fourth Proportional to 2,120.63, 3,182.43 and 1,428.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.63 : 3,182.43 = 1,428.62 : x
2. Step 2: Convert to fraction form
   2,120.63/3,182.43 = 1,428.62/x
3. Step 3: Cross multiply
   2,120.63x = 3,182.43 × 1,428.62
4. Step 4: Simplify right side
   2,120.63x = 4,546,483.15
5. Step 5: Solve for x
   x = 4,546,483.15/2,120.63
6. Step 6: Final answer
   x = 2,143.93