Finding the Fourth Proportional to 1,136.58, 1,702.73 and 648.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.58 : 1,702.73 = 648.15 : x
2. Step 2: Convert to fraction form
   1,136.58/1,702.73 = 648.15/x
3. Step 3: Cross multiply
   1,136.58x = 1,702.73 × 648.15
4. Step 4: Simplify right side
   1,136.58x = 1,103,624.45
5. Step 5: Solve for x
   x = 1,103,624.45/1,136.58
6. Step 6: Final answer
   x = 971.00