Finding the Fourth Proportional to 21,608.22, 29,821.74 and 12,535.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,608.22 : 29,821.74 = 12,535.59 : x
2. Step 2: Convert to fraction form
   21,608.22/29,821.74 = 12,535.59/x
3. Step 3: Cross multiply
   21,608.22x = 29,821.74 × 12,535.59
4. Step 4: Simplify right side
   21,608.22x = 373,833,170.55
5. Step 5: Solve for x
   x = 373,833,170.55/21,608.22
6. Step 6: Final answer
   x = 17,300.51