Finding the Fourth Proportional to 1,689.76, 2,536.46 and 1,418.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.76 : 2,536.46 = 1,418.82 : x
2. Step 2: Convert to fraction form
   1,689.76/2,536.46 = 1,418.82/x
3. Step 3: Cross multiply
   1,689.76x = 2,536.46 × 1,418.82
4. Step 4: Simplify right side
   1,689.76x = 3,598,780.18
5. Step 5: Solve for x
   x = 3,598,780.18/1,689.76
6. Step 6: Final answer
   x = 2,129.76