Finding the Fourth Proportional to 12,301.02, 16,978.19 and 7,821.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,301.02 : 16,978.19 = 7,821.27 : x
2. Step 2: Convert to fraction form
   12,301.02/16,978.19 = 7,821.27/x
3. Step 3: Cross multiply
   12,301.02x = 16,978.19 × 7,821.27
4. Step 4: Simplify right side
   12,301.02x = 132,790,968.99
5. Step 5: Solve for x
   x = 132,790,968.99/12,301.02
6. Step 6: Final answer
   x = 10,795.12