Finding the Fourth Proportional to 21,749.99, 30,013.56 and 12,795.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,749.99 : 30,013.56 = 12,795.76 : x
2. Step 2: Convert to fraction form
   21,749.99/30,013.56 = 12,795.76/x
3. Step 3: Cross multiply
   21,749.99x = 30,013.56 × 12,795.76
4. Step 4: Simplify right side
   21,749.99x = 384,046,310.51
5. Step 5: Solve for x
   x = 384,046,310.51/21,749.99
6. Step 6: Final answer
   x = 17,657.31