Finding the Fourth Proportional to 2,091.39, 3,123.83 and 1,971.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.39 : 3,123.83 = 1,971.43 : x
2. Step 2: Convert to fraction form
   2,091.39/3,123.83 = 1,971.43/x
3. Step 3: Cross multiply
   2,091.39x = 3,123.83 × 1,971.43
4. Step 4: Simplify right side
   2,091.39x = 6,158,412.18
5. Step 5: Solve for x
   x = 6,158,412.18/2,091.39
6. Step 6: Final answer
   x = 2,944.65