Finding the Fourth Proportional to 21,940.84, 30,281.34 and 13,448.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,940.84 : 30,281.34 = 13,448.02 : x
2. Step 2: Convert to fraction form
   21,940.84/30,281.34 = 13,448.02/x
3. Step 3: Cross multiply
   21,940.84x = 30,281.34 × 13,448.02
4. Step 4: Simplify right side
   21,940.84x = 407,224,065.95
5. Step 5: Solve for x
   x = 407,224,065.95/21,940.84
6. Step 6: Final answer
   x = 18,560.09