Finding the Fourth Proportional to 11,053.50, 15,266.79 and 7,321.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,053.50 : 15,266.79 = 7,321.02 : x
2. Step 2: Convert to fraction form
   11,053.50/15,266.79 = 7,321.02/x
3. Step 3: Cross multiply
   11,053.50x = 15,266.79 × 7,321.02
4. Step 4: Simplify right side
   11,053.50x = 111,768,474.93
5. Step 5: Solve for x
   x = 111,768,474.93/11,053.50
6. Step 6: Final answer
   x = 10,111.59