Finding the Fourth Proportional to 1,333.94, 1,997.12 and 1,109.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.94 : 1,997.12 = 1,109.78 : x
2. Step 2: Convert to fraction form
   1,333.94/1,997.12 = 1,109.78/x
3. Step 3: Cross multiply
   1,333.94x = 1,997.12 × 1,109.78
4. Step 4: Simplify right side
   1,333.94x = 2,216,363.83
5. Step 5: Solve for x
   x = 2,216,363.83/1,333.94
6. Step 6: Final answer
   x = 1,661.52