Finding the Fourth Proportional to 9,429.21, 13,012.08 and 5,451.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.21 : 13,012.08 = 5,451.57 : x
2. Step 2: Convert to fraction form
   9,429.21/13,012.08 = 5,451.57/x
3. Step 3: Cross multiply
   9,429.21x = 13,012.08 × 5,451.57
4. Step 4: Simplify right side
   9,429.21x = 70,936,264.97
5. Step 5: Solve for x
   x = 70,936,264.97/9,429.21
6. Step 6: Final answer
   x = 7,523.03