Finding the Fourth Proportional to 3,886.30, 5,350.71 and 3,621.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.30 : 5,350.71 = 3,621.34 : x
2. Step 2: Convert to fraction form
   3,886.30/5,350.71 = 3,621.34/x
3. Step 3: Cross multiply
   3,886.30x = 5,350.71 × 3,621.34
4. Step 4: Simplify right side
   3,886.30x = 19,376,740.15
5. Step 5: Solve for x
   x = 19,376,740.15/3,886.30
6. Step 6: Final answer
   x = 4,985.91