Finding the Fourth Proportional to 9,341.87, 12,890.77 and 5,756.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,341.87 : 12,890.77 = 5,756.21 : x
2. Step 2: Convert to fraction form
   9,341.87/12,890.77 = 5,756.21/x
3. Step 3: Cross multiply
   9,341.87x = 12,890.77 × 5,756.21
4. Step 4: Simplify right side
   9,341.87x = 74,201,900.34
5. Step 5: Solve for x
   x = 74,201,900.34/9,341.87
6. Step 6: Final answer
   x = 7,942.94