Finding the Fourth Proportional to 21,832.69, 30,127.80 and 12,883

Step by Step Solution

1. Step 1: Write the proportion equation
   21,832.69 : 30,127.80 = 12,883 : x
2. Step 2: Convert to fraction form
   21,832.69/30,127.80 = 12,883/x
3. Step 3: Cross multiply
   21,832.69x = 30,127.80 × 12,883
4. Step 4: Simplify right side
   21,832.69x = 388,136,447.40
5. Step 5: Solve for x
   x = 388,136,447.40/21,832.69
6. Step 6: Final answer
   x = 17,777.77