Finding the Fourth Proportional to 1,189.82, 1,642.17 and 692.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.82 : 1,642.17 = 692.58 : x
2. Step 2: Convert to fraction form
   1,189.82/1,642.17 = 692.58/x
3. Step 3: Cross multiply
   1,189.82x = 1,642.17 × 692.58
4. Step 4: Simplify right side
   1,189.82x = 1,137,342.85
5. Step 5: Solve for x
   x = 1,137,342.85/1,189.82
6. Step 6: Final answer
   x = 955.89