Finding the Fourth Proportional to 9,621.97, 13,276.43 and 5,429.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.97 : 13,276.43 = 5,429.41 : x
2. Step 2: Convert to fraction form
   9,621.97/13,276.43 = 5,429.41/x
3. Step 3: Cross multiply
   9,621.97x = 13,276.43 × 5,429.41
4. Step 4: Simplify right side
   9,621.97x = 72,083,181.81
5. Step 5: Solve for x
   x = 72,083,181.81/9,621.97
6. Step 6: Final answer
   x = 7,491.52