Finding the Fourth Proportional to 2,168.33, 2,990.91 and 1,422.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.33 : 2,990.91 = 1,422.34 : x
2. Step 2: Convert to fraction form
   2,168.33/2,990.91 = 1,422.34/x
3. Step 3: Cross multiply
   2,168.33x = 2,990.91 × 1,422.34
4. Step 4: Simplify right side
   2,168.33x = 4,254,075.97
5. Step 5: Solve for x
   x = 4,254,075.97/2,168.33
6. Step 6: Final answer
   x = 1,961.91