Finding the Fourth Proportional to 1,659.72, 2,289.78 and 1,037.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.72 : 2,289.78 = 1,037.64 : x
2. Step 2: Convert to fraction form
   1,659.72/2,289.78 = 1,037.64/x
3. Step 3: Cross multiply
   1,659.72x = 2,289.78 × 1,037.64
4. Step 4: Simplify right side
   1,659.72x = 2,375,967.32
5. Step 5: Solve for x
   x = 2,375,967.32/1,659.72
6. Step 6: Final answer
   x = 1,431.55