Finding the Fourth Proportional to 5,019.76, 7,526.90 and 3,986.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,019.76 : 7,526.90 = 3,986.40 : x
2. Step 2: Convert to fraction form
   5,019.76/7,526.90 = 3,986.40/x
3. Step 3: Cross multiply
   5,019.76x = 7,526.90 × 3,986.40
4. Step 4: Simplify right side
   5,019.76x = 30,005,234.16
5. Step 5: Solve for x
   x = 30,005,234.16/5,019.76
6. Step 6: Final answer
   x = 5,977.42