Finding the Fourth Proportional to 3,998.61, 5,488.72 and 3,546.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998.61 : 5,488.72 = 3,546.63 : x
2. Step 2: Convert to fraction form
   3,998.61/5,488.72 = 3,546.63/x
3. Step 3: Cross multiply
   3,998.61x = 5,488.72 × 3,546.63
4. Step 4: Simplify right side
   3,998.61x = 19,466,450.15
5. Step 5: Solve for x
   x = 19,466,450.15/3,998.61
6. Step 6: Final answer
   x = 4,868.30