Finding the Fourth Proportional to 21,658.48, 32,485.55 and 10,572.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,658.48 : 32,485.55 = 10,572.82 : x
2. Step 2: Convert to fraction form
   21,658.48/32,485.55 = 10,572.82/x
3. Step 3: Cross multiply
   21,658.48x = 32,485.55 × 10,572.82
4. Step 4: Simplify right side
   21,658.48x = 343,463,738.67
5. Step 5: Solve for x
   x = 343,463,738.67/21,658.48
6. Step 6: Final answer
   x = 15,858.17