Finding the Fourth Proportional to 1,659.06, 2,289.71 and 1,071.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.06 : 2,289.71 = 1,071.30 : x
2. Step 2: Convert to fraction form
   1,659.06/2,289.71 = 1,071.30/x
3. Step 3: Cross multiply
   1,659.06x = 2,289.71 × 1,071.30
4. Step 4: Simplify right side
   1,659.06x = 2,452,966.32
5. Step 5: Solve for x
   x = 2,452,966.32/1,659.06
6. Step 6: Final answer
   x = 1,478.53