Finding the Fourth Proportional to 21,082.53, 29,089.60 and 12,581.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,082.53 : 29,089.60 = 12,581.94 : x
2. Step 2: Convert to fraction form
   21,082.53/29,089.60 = 12,581.94/x
3. Step 3: Cross multiply
   21,082.53x = 29,089.60 × 12,581.94
4. Step 4: Simplify right side
   21,082.53x = 366,003,601.82
5. Step 5: Solve for x
   x = 366,003,601.82/21,082.53
6. Step 6: Final answer
   x = 17,360.52