Finding the Fourth Proportional to 14,321.73, 21,469.64 and 5,085.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,321.73 : 21,469.64 = 5,085.57 : x
2. Step 2: Convert to fraction form
   14,321.73/21,469.64 = 5,085.57/x
3. Step 3: Cross multiply
   14,321.73x = 21,469.64 × 5,085.57
4. Step 4: Simplify right side
   14,321.73x = 109,185,331.67
5. Step 5: Solve for x
   x = 109,185,331.67/14,321.73
6. Step 6: Final answer
   x = 7,623.75