Finding the Fourth Proportional to 1,335.54, 1,992.59 and 1,197.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.54 : 1,992.59 = 1,197.30 : x
2. Step 2: Convert to fraction form
   1,335.54/1,992.59 = 1,197.30/x
3. Step 3: Cross multiply
   1,335.54x = 1,992.59 × 1,197.30
4. Step 4: Simplify right side
   1,335.54x = 2,385,722.02
5. Step 5: Solve for x
   x = 2,385,722.02/1,335.54
6. Step 6: Final answer
   x = 1,786.34