Finding the Fourth Proportional to 10,128.99, 15,193.38 and 3,553.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.99 : 15,193.38 = 3,553.62 : x
2. Step 2: Convert to fraction form
   10,128.99/15,193.38 = 3,553.62/x
3. Step 3: Cross multiply
   10,128.99x = 15,193.38 × 3,553.62
4. Step 4: Simplify right side
   10,128.99x = 53,991,499.04
5. Step 5: Solve for x
   x = 53,991,499.04/10,128.99
6. Step 6: Final answer
   x = 5,330.39