Finding the Fourth Proportional to 2,128.05, 3,190.82 and 1,426.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.05 : 3,190.82 = 1,426.05 : x
2. Step 2: Convert to fraction form
   2,128.05/3,190.82 = 1,426.05/x
3. Step 3: Cross multiply
   2,128.05x = 3,190.82 × 1,426.05
4. Step 4: Simplify right side
   2,128.05x = 4,550,256.47
5. Step 5: Solve for x
   x = 4,550,256.47/2,128.05
6. Step 6: Final answer
   x = 2,138.23