Finding the Fourth Proportional to 11,881.89, 17,825.67 and 3,561.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,881.89 : 17,825.67 = 3,561.57 : x
2. Step 2: Convert to fraction form
   11,881.89/17,825.67 = 3,561.57/x
3. Step 3: Cross multiply
   11,881.89x = 17,825.67 × 3,561.57
4. Step 4: Simplify right side
   11,881.89x = 63,487,371.50
5. Step 5: Solve for x
   x = 63,487,371.50/11,881.89
6. Step 6: Final answer
   x = 5,343.20