Finding the Fourth Proportional to 2,661.89, 3,992.15 and 1,102.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.89 : 3,992.15 = 1,102.33 : x
2. Step 2: Convert to fraction form
   2,661.89/3,992.15 = 1,102.33/x
3. Step 3: Cross multiply
   2,661.89x = 3,992.15 × 1,102.33
4. Step 4: Simplify right side
   2,661.89x = 4,400,666.71
5. Step 5: Solve for x
   x = 4,400,666.71/2,661.89
6. Step 6: Final answer
   x = 1,653.21