Finding the Fourth Proportional to 1,182.72, 1,632.18 and 658.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.72 : 1,632.18 = 658.80 : x
2. Step 2: Convert to fraction form
   1,182.72/1,632.18 = 658.80/x
3. Step 3: Cross multiply
   1,182.72x = 1,632.18 × 658.80
4. Step 4: Simplify right side
   1,182.72x = 1,075,280.18
5. Step 5: Solve for x
   x = 1,075,280.18/1,182.72
6. Step 6: Final answer
   x = 909.16