Finding the Fourth Proportional to 3,619.71, 5,423.22 and 1,667.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,619.71 : 5,423.22 = 1,667.88 : x
2. Step 2: Convert to fraction form
   3,619.71/5,423.22 = 1,667.88/x
3. Step 3: Cross multiply
   3,619.71x = 5,423.22 × 1,667.88
4. Step 4: Simplify right side
   3,619.71x = 9,045,280.17
5. Step 5: Solve for x
   x = 9,045,280.17/3,619.71
6. Step 6: Final answer
   x = 2,498.90