Finding the Fourth Proportional to 1,189.42, 1,641.24 and 692.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.42 : 1,641.24 = 692.18 : x
2. Step 2: Convert to fraction form
   1,189.42/1,641.24 = 692.18/x
3. Step 3: Cross multiply
   1,189.42x = 1,641.24 × 692.18
4. Step 4: Simplify right side
   1,189.42x = 1,136,033.50
5. Step 5: Solve for x
   x = 1,136,033.50/1,189.42
6. Step 6: Final answer
   x = 955.12