Finding the Fourth Proportional to 2,118.93, 2,921.31 and 1,739.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.93 : 2,921.31 = 1,739.43 : x
2. Step 2: Convert to fraction form
   2,118.93/2,921.31 = 1,739.43/x
3. Step 3: Cross multiply
   2,118.93x = 2,921.31 × 1,739.43
4. Step 4: Simplify right side
   2,118.93x = 5,081,414.25
5. Step 5: Solve for x
   x = 5,081,414.25/2,118.93
6. Step 6: Final answer
   x = 2,398.10