Finding the Fourth Proportional to 1,059.89, 1,586.52 and 670.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.89 : 1,586.52 = 670.28 : x
2. Step 2: Convert to fraction form
   1,059.89/1,586.52 = 670.28/x
3. Step 3: Cross multiply
   1,059.89x = 1,586.52 × 670.28
4. Step 4: Simplify right side
   1,059.89x = 1,063,404.69
5. Step 5: Solve for x
   x = 1,063,404.69/1,059.89
6. Step 6: Final answer
   x = 1,003.32