Finding the Fourth Proportional to 21,568.60, 29,780.89 and 21,224.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,568.60 : 29,780.89 = 21,224.15 : x
2. Step 2: Convert to fraction form
   21,568.60/29,780.89 = 21,224.15/x
3. Step 3: Cross multiply
   21,568.60x = 29,780.89 × 21,224.15
4. Step 4: Simplify right side
   21,568.60x = 632,073,970.37
5. Step 5: Solve for x
   x = 632,073,970.37/21,568.60
6. Step 6: Final answer
   x = 29,305.29