Finding the Fourth Proportional to 2,478.84, 3,419.82 and 1,639.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.84 : 3,419.82 = 1,639.98 : x
2. Step 2: Convert to fraction form
   2,478.84/3,419.82 = 1,639.98/x
3. Step 3: Cross multiply
   2,478.84x = 3,419.82 × 1,639.98
4. Step 4: Simplify right side
   2,478.84x = 5,608,436.40
5. Step 5: Solve for x
   x = 5,608,436.40/2,478.84
6. Step 6: Final answer
   x = 2,262.52