Finding the Fourth Proportional to 9,669.30, 13,343.22 and 5,420.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,669.30 : 13,343.22 = 5,420.76 : x
2. Step 2: Convert to fraction form
   9,669.30/13,343.22 = 5,420.76/x
3. Step 3: Cross multiply
   9,669.30x = 13,343.22 × 5,420.76
4. Step 4: Simplify right side
   9,669.30x = 72,330,393.25
5. Step 5: Solve for x
   x = 72,330,393.25/9,669.30
6. Step 6: Final answer
   x = 7,480.42