Finding the Fourth Proportional to 21,192.69, 29,242.67 and 12,692.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,192.69 : 29,242.67 = 12,692.82 : x
2. Step 2: Convert to fraction form
   21,192.69/29,242.67 = 12,692.82/x
3. Step 3: Cross multiply
   21,192.69x = 29,242.67 × 12,692.82
4. Step 4: Simplify right side
   21,192.69x = 371,171,883.17
5. Step 5: Solve for x
   x = 371,171,883.17/21,192.69
6. Step 6: Final answer
   x = 17,514.15