Finding the Fourth Proportional to 2,143.46, 3,212.89 and 1,402.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.46 : 3,212.89 = 1,402.79 : x
2. Step 2: Convert to fraction form
   2,143.46/3,212.89 = 1,402.79/x
3. Step 3: Cross multiply
   2,143.46x = 3,212.89 × 1,402.79
4. Step 4: Simplify right side
   2,143.46x = 4,507,009.96
5. Step 5: Solve for x
   x = 4,507,009.96/2,143.46
6. Step 6: Final answer
   x = 2,102.68