Finding the Fourth Proportional to 1,333.75, 1,992.53 and 1,115.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.75 : 1,992.53 = 1,115.05 : x
2. Step 2: Convert to fraction form
   1,333.75/1,992.53 = 1,115.05/x
3. Step 3: Cross multiply
   1,333.75x = 1,992.53 × 1,115.05
4. Step 4: Simplify right side
   1,333.75x = 2,221,770.58
5. Step 5: Solve for x
   x = 2,221,770.58/1,333.75
6. Step 6: Final answer
   x = 1,665.81