Finding the Fourth Proportional to 11,981.48, 17,970.60 and 3,216.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,981.48 : 17,970.60 = 3,216.47 : x
2. Step 2: Convert to fraction form
   11,981.48/17,970.60 = 3,216.47/x
3. Step 3: Cross multiply
   11,981.48x = 17,970.60 × 3,216.47
4. Step 4: Simplify right side
   11,981.48x = 57,801,895.78
5. Step 5: Solve for x
   x = 57,801,895.78/11,981.48
6. Step 6: Final answer
   x = 4,824.27