Finding the Fourth Proportional to 9,669.47, 13,343.74 and 5,420.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,669.47 : 13,343.74 = 5,420.52 : x
2. Step 2: Convert to fraction form
   9,669.47/13,343.74 = 5,420.52/x
3. Step 3: Cross multiply
   9,669.47x = 13,343.74 × 5,420.52
4. Step 4: Simplify right side
   9,669.47x = 72,330,009.54
5. Step 5: Solve for x
   x = 72,330,009.54/9,669.47
6. Step 6: Final answer
   x = 7,480.25