Finding the Fourth Proportional to 21,234.33, 29,300.99 and 12,736.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,234.33 : 29,300.99 = 12,736.79 : x
2. Step 2: Convert to fraction form
   21,234.33/29,300.99 = 12,736.79/x
3. Step 3: Cross multiply
   21,234.33x = 29,300.99 × 12,736.79
4. Step 4: Simplify right side
   21,234.33x = 373,200,692.57
5. Step 5: Solve for x
   x = 373,200,692.57/21,234.33
6. Step 6: Final answer
   x = 17,575.35