Finding the Fourth Proportional to 1,690.89, 2,538.15 and 1,419.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.89 : 2,538.15 = 1,419.94 : x
2. Step 2: Convert to fraction form
   1,690.89/2,538.15 = 1,419.94/x
3. Step 3: Cross multiply
   1,690.89x = 2,538.15 × 1,419.94
4. Step 4: Simplify right side
   1,690.89x = 3,604,020.71
5. Step 5: Solve for x
   x = 3,604,020.71/1,690.89
6. Step 6: Final answer
   x = 2,131.43