Finding the Fourth Proportional to 21,022.41, 31,514.67 and 7,685.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,022.41 : 31,514.67 = 7,685.94 : x
2. Step 2: Convert to fraction form
   21,022.41/31,514.67 = 7,685.94/x
3. Step 3: Cross multiply
   21,022.41x = 31,514.67 × 7,685.94
4. Step 4: Simplify right side
   21,022.41x = 242,219,803.65
5. Step 5: Solve for x
   x = 242,219,803.65/21,022.41
6. Step 6: Final answer
   x = 11,521.98