Finding the Fourth Proportional to 2,422.84, 3,343.80 and 1,638.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,422.84 : 3,343.80 = 1,638.76 : x
2. Step 2: Convert to fraction form
   2,422.84/3,343.80 = 1,638.76/x
3. Step 3: Cross multiply
   2,422.84x = 3,343.80 × 1,638.76
4. Step 4: Simplify right side
   2,422.84x = 5,479,685.69
5. Step 5: Solve for x
   x = 5,479,685.69/2,422.84
6. Step 6: Final answer
   x = 2,261.68