Finding the Fourth Proportional to 1,424.84, 2,123.54 and 1,422.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.84 : 2,123.54 = 1,422.68 : x
2. Step 2: Convert to fraction form
   1,424.84/2,123.54 = 1,422.68/x
3. Step 3: Cross multiply
   1,424.84x = 2,123.54 × 1,422.68
4. Step 4: Simplify right side
   1,424.84x = 3,021,117.89
5. Step 5: Solve for x
   x = 3,021,117.89/1,424.84
6. Step 6: Final answer
   x = 2,120.32