Finding the Fourth Proportional to 2,162.13, 2,983.72 and 1,230.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.13 : 2,983.72 = 1,230.63 : x
2. Step 2: Convert to fraction form
   2,162.13/2,983.72 = 1,230.63/x
3. Step 3: Cross multiply
   2,162.13x = 2,983.72 × 1,230.63
4. Step 4: Simplify right side
   2,162.13x = 3,671,843.39
5. Step 5: Solve for x
   x = 3,671,843.39/2,162.13
6. Step 6: Final answer
   x = 1,698.26