Finding the Fourth Proportional to 8,002.76, 11,946.38 and 7,643.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,002.76 : 11,946.38 = 7,643.30 : x
2. Step 2: Convert to fraction form
   8,002.76/11,946.38 = 7,643.30/x
3. Step 3: Cross multiply
   8,002.76x = 11,946.38 × 7,643.30
4. Step 4: Simplify right side
   8,002.76x = 91,309,668.31
5. Step 5: Solve for x
   x = 91,309,668.31/8,002.76
6. Step 6: Final answer
   x = 11,409.78