Finding the Fourth Proportional to 1,335.04, 1,991.84 and 1,196.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.04 : 1,991.84 = 1,196.80 : x
2. Step 2: Convert to fraction form
   1,335.04/1,991.84 = 1,196.80/x
3. Step 3: Cross multiply
   1,335.04x = 1,991.84 × 1,196.80
4. Step 4: Simplify right side
   1,335.04x = 2,383,834.11
5. Step 5: Solve for x
   x = 2,383,834.11/1,335.04
6. Step 6: Final answer
   x = 1,785.59