Finding the Fourth Proportional to 11,112.84, 16,669.10 and 3,321.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,112.84 : 16,669.10 = 3,321.72 : x
2. Step 2: Convert to fraction form
   11,112.84/16,669.10 = 3,321.72/x
3. Step 3: Cross multiply
   11,112.84x = 16,669.10 × 3,321.72
4. Step 4: Simplify right side
   11,112.84x = 55,370,082.85
5. Step 5: Solve for x
   x = 55,370,082.85/11,112.84
6. Step 6: Final answer
   x = 4,982.53