Finding the Fourth Proportional to 21,085.59, 31,629.69 and 7,046.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,085.59 : 31,629.69 = 7,046.88 : x
2. Step 2: Convert to fraction form
   21,085.59/31,629.69 = 7,046.88/x
3. Step 3: Cross multiply
   21,085.59x = 31,629.69 × 7,046.88
4. Step 4: Simplify right side
   21,085.59x = 222,890,629.87
5. Step 5: Solve for x
   x = 222,890,629.87/21,085.59
6. Step 6: Final answer
   x = 10,570.76