Finding the Fourth Proportional to 1,059.34, 1,589.52 and 648.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.34 : 1,589.52 = 648.25 : x
2. Step 2: Convert to fraction form
   1,059.34/1,589.52 = 648.25/x
3. Step 3: Cross multiply
   1,059.34x = 1,589.52 × 648.25
4. Step 4: Simplify right side
   1,059.34x = 1,030,395.15
5. Step 5: Solve for x
   x = 1,030,395.15/1,059.34
6. Step 6: Final answer
   x = 972.68