Finding the Fourth Proportional to 2,727.55, 4,090.51 and 1,428.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,727.55 : 4,090.51 = 1,428.31 : x
2. Step 2: Convert to fraction form
   2,727.55/4,090.51 = 1,428.31/x
3. Step 3: Cross multiply
   2,727.55x = 4,090.51 × 1,428.31
4. Step 4: Simplify right side
   2,727.55x = 5,842,516.34
5. Step 5: Solve for x
   x = 5,842,516.34/2,727.55
6. Step 6: Final answer
   x = 2,142.04