Finding the Fourth Proportional to 2,089.42, 3,131.70 and 1,679.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.42 : 3,131.70 = 1,679.02 : x
2. Step 2: Convert to fraction form
   2,089.42/3,131.70 = 1,679.02/x
3. Step 3: Cross multiply
   2,089.42x = 3,131.70 × 1,679.02
4. Step 4: Simplify right side
   2,089.42x = 5,258,186.93
5. Step 5: Solve for x
   x = 5,258,186.93/2,089.42
6. Step 6: Final answer
   x = 2,516.58