Finding the Fourth Proportional to 11,718.50, 17,580.63 and 3,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,718.50 : 17,580.63 = 3,510.50 : x
2. Step 2: Convert to fraction form
   11,718.50/17,580.63 = 3,510.50/x
3. Step 3: Cross multiply
   11,718.50x = 17,580.63 × 3,510.50
4. Step 4: Simplify right side
   11,718.50x = 61,716,801.62
5. Step 5: Solve for x
   x = 61,716,801.62/11,718.50
6. Step 6: Final answer
   x = 5,266.61