Finding the Fourth Proportional to 10,428.48, 15,629.60 and 7,451.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.48 : 15,629.60 = 7,451.43 : x
2. Step 2: Convert to fraction form
   10,428.48/15,629.60 = 7,451.43/x
3. Step 3: Cross multiply
   10,428.48x = 15,629.60 × 7,451.43
4. Step 4: Simplify right side
   10,428.48x = 116,462,870.33
5. Step 5: Solve for x
   x = 116,462,870.33/10,428.48
6. Step 6: Final answer
   x = 11,167.77