Finding the Fourth Proportional to 11,275.72, 15,560.64 and 7,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,275.72 : 15,560.64 = 7,028.50 : x
2. Step 2: Convert to fraction form
   11,275.72/15,560.64 = 7,028.50/x
3. Step 3: Cross multiply
   11,275.72x = 15,560.64 × 7,028.50
4. Step 4: Simplify right side
   11,275.72x = 109,367,958.24
5. Step 5: Solve for x
   x = 109,367,958.24/11,275.72
6. Step 6: Final answer
   x = 9,699.42