Finding the Fourth Proportional to 4,086.60, 5,638.50 and 3,079.32

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.60 : 5,638.50 = 3,079.32 : x
2. Step 2: Convert to fraction form
   4,086.60/5,638.50 = 3,079.32/x
3. Step 3: Cross multiply
   4,086.60x = 5,638.50 × 3,079.32
4. Step 4: Simplify right side
   4,086.60x = 17,362,745.82
5. Step 5: Solve for x
   x = 17,362,745.82/4,086.60
6. Step 6: Final answer
   x = 4,248.70