Finding the Fourth Proportional to 2,156.31, 3,233.79 and 1,429.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.31 : 3,233.79 = 1,429.74 : x
2. Step 2: Convert to fraction form
   2,156.31/3,233.79 = 1,429.74/x
3. Step 3: Cross multiply
   2,156.31x = 3,233.79 × 1,429.74
4. Step 4: Simplify right side
   2,156.31x = 4,623,478.91
5. Step 5: Solve for x
   x = 4,623,478.91/2,156.31
6. Step 6: Final answer
   x = 2,144.16