Finding the Fourth Proportional to 11,940.21, 16,510.23 and 10,074.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,940.21 : 16,510.23 = 10,074.78 : x
2. Step 2: Convert to fraction form
   11,940.21/16,510.23 = 10,074.78/x
3. Step 3: Cross multiply
   11,940.21x = 16,510.23 × 10,074.78
4. Step 4: Simplify right side
   11,940.21x = 166,336,935.00
5. Step 5: Solve for x
   x = 166,336,935.00/11,940.21
6. Step 6: Final answer
   x = 13,930.82