Finding the Fourth Proportional to 11,987.30, 17,980.34 and 3,222.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,987.30 : 17,980.34 = 3,222.29 : x
2. Step 2: Convert to fraction form
   11,987.30/17,980.34 = 3,222.29/x
3. Step 3: Cross multiply
   11,987.30x = 17,980.34 × 3,222.29
4. Step 4: Simplify right side
   11,987.30x = 57,937,869.78
5. Step 5: Solve for x
   x = 57,937,869.78/11,987.30
6. Step 6: Final answer
   x = 4,833.27