Finding the Fourth Proportional to 11,991.71, 17,984.50 and 3,556.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,991.71 : 17,984.50 = 3,556.25 : x
2. Step 2: Convert to fraction form
   11,991.71/17,984.50 = 3,556.25/x
3. Step 3: Cross multiply
   11,991.71x = 17,984.50 × 3,556.25
4. Step 4: Simplify right side
   11,991.71x = 63,957,279.31
5. Step 5: Solve for x
   x = 63,957,279.31/11,991.71
6. Step 6: Final answer
   x = 5,333.46