Finding the Fourth Proportional to 11,991.58, 17,985.98 and 3,225.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,991.58 : 17,985.98 = 3,225.80 : x
2. Step 2: Convert to fraction form
   11,991.58/17,985.98 = 3,225.80/x
3. Step 3: Cross multiply
   11,991.58x = 17,985.98 × 3,225.80
4. Step 4: Simplify right side
   11,991.58x = 58,019,227.31
5. Step 5: Solve for x
   x = 58,019,227.31/11,991.58
6. Step 6: Final answer
   x = 4,838.33