Finding the Fourth Proportional to 11,390.72, 17,082.56 and 4,816.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,390.72 : 17,082.56 = 4,816.80 : x
2. Step 2: Convert to fraction form
   11,390.72/17,082.56 = 4,816.80/x
3. Step 3: Cross multiply
   11,390.72x = 17,082.56 × 4,816.80
4. Step 4: Simplify right side
   11,390.72x = 82,283,275.01
5. Step 5: Solve for x
   x = 82,283,275.01/11,390.72
6. Step 6: Final answer
   x = 7,223.71