Finding the Fourth Proportional to 21,074.72, 31,601.46 and 7,029.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,074.72 : 31,601.46 = 7,029.88 : x
2. Step 2: Convert to fraction form
   21,074.72/31,601.46 = 7,029.88/x
3. Step 3: Cross multiply
   21,074.72x = 31,601.46 × 7,029.88
4. Step 4: Simplify right side
   21,074.72x = 222,154,471.62
5. Step 5: Solve for x
   x = 222,154,471.62/21,074.72
6. Step 6: Final answer
   x = 10,541.28