Finding the Fourth Proportional to 1,434.72, 2,154.42 and 1,253.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.72 : 2,154.42 = 1,253.28 : x
2. Step 2: Convert to fraction form
   1,434.72/2,154.42 = 1,253.28/x
3. Step 3: Cross multiply
   1,434.72x = 2,154.42 × 1,253.28
4. Step 4: Simplify right side
   1,434.72x = 2,700,091.50
5. Step 5: Solve for x
   x = 2,700,091.50/1,434.72
6. Step 6: Final answer
   x = 1,881.96