Finding the Fourth Proportional to 13,021.66, 17,969.79 and 7,053.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,021.66 : 17,969.79 = 7,053.31 : x
2. Step 2: Convert to fraction form
   13,021.66/17,969.79 = 7,053.31/x
3. Step 3: Cross multiply
   13,021.66x = 17,969.79 × 7,053.31
4. Step 4: Simplify right side
   13,021.66x = 126,746,499.50
5. Step 5: Solve for x
   x = 126,746,499.50/13,021.66
6. Step 6: Final answer
   x = 9,733.51