Finding the Fourth Proportional to 11,748.67, 17,624.15 and 3,428.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,748.67 : 17,624.15 = 3,428.75 : x
2. Step 2: Convert to fraction form
   11,748.67/17,624.15 = 3,428.75/x
3. Step 3: Cross multiply
   11,748.67x = 17,624.15 × 3,428.75
4. Step 4: Simplify right side
   11,748.67x = 60,428,804.31
5. Step 5: Solve for x
   x = 60,428,804.31/11,748.67
6. Step 6: Final answer
   x = 5,143.46