Finding the Fourth Proportional to 2,142.72, 2,954.34 and 1,396.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 2,954.34 = 1,396.37 : x
2. Step 2: Convert to fraction form
   2,142.72/2,954.34 = 1,396.37/x
3. Step 3: Cross multiply
   2,142.72x = 2,954.34 × 1,396.37
4. Step 4: Simplify right side
   2,142.72x = 4,125,359.13
5. Step 5: Solve for x
   x = 4,125,359.13/2,142.72
6. Step 6: Final answer
   x = 1,925.29