Finding the Fourth Proportional to 2,216.28, 3,319.80 and 1,667.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.28 : 3,319.80 = 1,667.70 : x
2. Step 2: Convert to fraction form
   2,216.28/3,319.80 = 1,667.70/x
3. Step 3: Cross multiply
   2,216.28x = 3,319.80 × 1,667.70
4. Step 4: Simplify right side
   2,216.28x = 5,536,430.46
5. Step 5: Solve for x
   x = 5,536,430.46/2,216.28
6. Step 6: Final answer
   x = 2,498.07