Finding the Fourth Proportional to 11,639.69, 17,459.89 and 2,874.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,639.69 : 17,459.89 = 2,874.60 : x
2. Step 2: Convert to fraction form
   11,639.69/17,459.89 = 2,874.60/x
3. Step 3: Cross multiply
   11,639.69x = 17,459.89 × 2,874.60
4. Step 4: Simplify right side
   11,639.69x = 50,190,199.79
5. Step 5: Solve for x
   x = 50,190,199.79/11,639.69
6. Step 6: Final answer
   x = 4,311.99