Finding the Fourth Proportional to 21,150.05, 29,188.57 and 12,075.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.05 : 29,188.57 = 12,075.82 : x
2. Step 2: Convert to fraction form
   21,150.05/29,188.57 = 12,075.82/x
3. Step 3: Cross multiply
   21,150.05x = 29,188.57 × 12,075.82
4. Step 4: Simplify right side
   21,150.05x = 352,475,917.38
5. Step 5: Solve for x
   x = 352,475,917.38/21,150.05
6. Step 6: Final answer
   x = 16,665.49