Finding the Fourth Proportional to 1,689.83, 2,536.56 and 1,418.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.83 : 2,536.56 = 1,418.88 : x
2. Step 2: Convert to fraction form
   1,689.83/2,536.56 = 1,418.88/x
3. Step 3: Cross multiply
   1,689.83x = 2,536.56 × 1,418.88
4. Step 4: Simplify right side
   1,689.83x = 3,599,067.16
5. Step 5: Solve for x
   x = 3,599,067.16/1,689.83
6. Step 6: Final answer
   x = 2,129.85