Finding the Fourth Proportional to 3,978.62, 5,488.41 and 2,702.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.62 : 5,488.41 = 2,702.05 : x
2. Step 2: Convert to fraction form
   3,978.62/5,488.41 = 2,702.05/x
3. Step 3: Cross multiply
   3,978.62x = 5,488.41 × 2,702.05
4. Step 4: Simplify right side
   3,978.62x = 14,829,930.80
5. Step 5: Solve for x
   x = 14,829,930.80/3,978.62
6. Step 6: Final answer
   x = 3,727.41