Finding the Fourth Proportional to 21,104.66, 31,658.63 and 7,064.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,104.66 : 31,658.63 = 7,064.72 : x
2. Step 2: Convert to fraction form
   21,104.66/31,658.63 = 7,064.72/x
3. Step 3: Cross multiply
   21,104.66x = 31,658.63 × 7,064.72
4. Step 4: Simplify right side
   21,104.66x = 223,659,356.53
5. Step 5: Solve for x
   x = 223,659,356.53/21,104.66
6. Step 6: Final answer
   x = 10,597.63