Finding the Fourth Proportional to 1,434.48, 2,150.16 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.48 : 2,150.16 = 1,086.72 : x
2. Step 2: Convert to fraction form
   1,434.48/2,150.16 = 1,086.72/x
3. Step 3: Cross multiply
   1,434.48x = 2,150.16 × 1,086.72
4. Step 4: Simplify right side
   1,434.48x = 2,336,621.88
5. Step 5: Solve for x
   x = 2,336,621.88/1,434.48
6. Step 6: Final answer
   x = 1,628.90