Finding the Fourth Proportional to 11,751.37, 17,628.70 and 3,431.99

Step by Step Solution

1. Step 1: Write the proportion equation
   11,751.37 : 17,628.70 = 3,431.99 : x
2. Step 2: Convert to fraction form
   11,751.37/17,628.70 = 3,431.99/x
3. Step 3: Cross multiply
   11,751.37x = 17,628.70 × 3,431.99
4. Step 4: Simplify right side
   11,751.37x = 60,501,564.04
5. Step 5: Solve for x
   x = 60,501,564.04/11,751.37
6. Step 6: Final answer
   x = 5,148.47