Finding the Fourth Proportional to 21,522.51, 29,696.83 and 12,570.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,522.51 : 29,696.83 = 12,570.39 : x
2. Step 2: Convert to fraction form
   21,522.51/29,696.83 = 12,570.39/x
3. Step 3: Cross multiply
   21,522.51x = 29,696.83 × 12,570.39
4. Step 4: Simplify right side
   21,522.51x = 373,300,703.44
5. Step 5: Solve for x
   x = 373,300,703.44/21,522.51
6. Step 6: Final answer
   x = 17,344.66