Finding the Fourth Proportional to 2,219.88, 3,061.58 and 1,661.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.88 : 3,061.58 = 1,661.67 : x
2. Step 2: Convert to fraction form
   2,219.88/3,061.58 = 1,661.67/x
3. Step 3: Cross multiply
   2,219.88x = 3,061.58 × 1,661.67
4. Step 4: Simplify right side
   2,219.88x = 5,087,335.64
5. Step 5: Solve for x
   x = 5,087,335.64/2,219.88
6. Step 6: Final answer
   x = 2,291.72