Finding the Fourth Proportional to 21,877.31, 30,189.98 and 12,317.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,877.31 : 30,189.98 = 12,317.69 : x
2. Step 2: Convert to fraction form
   21,877.31/30,189.98 = 12,317.69/x
3. Step 3: Cross multiply
   21,877.31x = 30,189.98 × 12,317.69
4. Step 4: Simplify right side
   21,877.31x = 371,870,694.59
5. Step 5: Solve for x
   x = 371,870,694.59/21,877.31
6. Step 6: Final answer
   x = 16,998.01