Finding the Fourth Proportional to 7,443.90, 10,272.69 and 4,086.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,443.90 : 10,272.69 = 4,086.86 : x
2. Step 2: Convert to fraction form
   7,443.90/10,272.69 = 4,086.86/x
3. Step 3: Cross multiply
   7,443.90x = 10,272.69 × 4,086.86
4. Step 4: Simplify right side
   7,443.90x = 41,982,994.49
5. Step 5: Solve for x
   x = 41,982,994.49/7,443.90
6. Step 6: Final answer
   x = 5,639.92