Finding the Fourth Proportional to 9,621.33, 13,278.53 and 5,429.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.33 : 13,278.53 = 5,429.25 : x
2. Step 2: Convert to fraction form
   9,621.33/13,278.53 = 5,429.25/x
3. Step 3: Cross multiply
   9,621.33x = 13,278.53 × 5,429.25
4. Step 4: Simplify right side
   9,621.33x = 72,092,431.86
5. Step 5: Solve for x
   x = 72,092,431.86/9,621.33
6. Step 6: Final answer
   x = 7,492.98