Finding the Fourth Proportional to 21,568.77, 32,311.69 and 13,224.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,568.77 : 32,311.69 = 13,224.45 : x
2. Step 2: Convert to fraction form
   21,568.77/32,311.69 = 13,224.45/x
3. Step 3: Cross multiply
   21,568.77x = 32,311.69 × 13,224.45
4. Step 4: Simplify right side
   21,568.77x = 427,304,328.82
5. Step 5: Solve for x
   x = 427,304,328.82/21,568.77
6. Step 6: Final answer
   x = 19,811.25