Finding the Fourth Proportional to 1,190.32, 1,642.41 and 692.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.32 : 1,642.41 = 692.78 : x
2. Step 2: Convert to fraction form
   1,190.32/1,642.41 = 692.78/x
3. Step 3: Cross multiply
   1,190.32x = 1,642.41 × 692.78
4. Step 4: Simplify right side
   1,190.32x = 1,137,820.59
5. Step 5: Solve for x
   x = 1,137,820.59/1,190.32
6. Step 6: Final answer
   x = 955.90