Finding the Fourth Proportional to 2,167.91, 2,990.91 and 1,422.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.91 : 2,990.91 = 1,422.29 : x
2. Step 2: Convert to fraction form
   2,167.91/2,990.91 = 1,422.29/x
3. Step 3: Cross multiply
   2,167.91x = 2,990.91 × 1,422.29
4. Step 4: Simplify right side
   2,167.91x = 4,253,931.76
5. Step 5: Solve for x
   x = 4,253,931.76/2,167.91
6. Step 6: Final answer
   x = 1,962.22