Finding the Fourth Proportional to 21,981.57, 30,334.59 and 13,033.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,981.57 : 30,334.59 = 13,033.50 : x
2. Step 2: Convert to fraction form
   21,981.57/30,334.59 = 13,033.50/x
3. Step 3: Cross multiply
   21,981.57x = 30,334.59 × 13,033.50
4. Step 4: Simplify right side
   21,981.57x = 395,365,878.77
5. Step 5: Solve for x
   x = 395,365,878.77/21,981.57
6. Step 6: Final answer
   x = 17,986.24