Finding the Fourth Proportional to 9,912.04, 13,676.20 and 5,720.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,912.04 : 13,676.20 = 5,720.28 : x
2. Step 2: Convert to fraction form
   9,912.04/13,676.20 = 5,720.28/x
3. Step 3: Cross multiply
   9,912.04x = 13,676.20 × 5,720.28
4. Step 4: Simplify right side
   9,912.04x = 78,231,693.34
5. Step 5: Solve for x
   x = 78,231,693.34/9,912.04
6. Step 6: Final answer
   x = 7,892.59