Finding the Fourth Proportional to 13,021.98, 17,971.43 and 7,357.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,021.98 : 17,971.43 = 7,357.76 : x
2. Step 2: Convert to fraction form
   13,021.98/17,971.43 = 7,357.76/x
3. Step 3: Cross multiply
   13,021.98x = 17,971.43 × 7,357.76
4. Step 4: Simplify right side
   13,021.98x = 132,229,468.80
5. Step 5: Solve for x
   x = 132,229,468.80/13,021.98
6. Step 6: Final answer
   x = 10,154.33