Finding the Fourth Proportional to 21,483.57, 29,650.89 and 12,531.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,483.57 : 29,650.89 = 12,531.07 : x
2. Step 2: Convert to fraction form
   21,483.57/29,650.89 = 12,531.07/x
3. Step 3: Cross multiply
   21,483.57x = 29,650.89 × 12,531.07
4. Step 4: Simplify right side
   21,483.57x = 371,557,315.50
5. Step 5: Solve for x
   x = 371,557,315.50/21,483.57
6. Step 6: Final answer
   x = 17,294.95