Finding the Fourth Proportional to 1,059.32, 1,587.84 and 648.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.32 : 1,587.84 = 648.73 : x
2. Step 2: Convert to fraction form
   1,059.32/1,587.84 = 648.73/x
3. Step 3: Cross multiply
   1,059.32x = 1,587.84 × 648.73
4. Step 4: Simplify right side
   1,059.32x = 1,030,075.47
5. Step 5: Solve for x
   x = 1,030,075.47/1,059.32
6. Step 6: Final answer
   x = 972.39