Finding the Fourth Proportional to 11,300.37, 15,600.72 and 7,720.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,300.37 : 15,600.72 = 7,720.71 : x
2. Step 2: Convert to fraction form
   11,300.37/15,600.72 = 7,720.71/x
3. Step 3: Cross multiply
   11,300.37x = 15,600.72 × 7,720.71
4. Step 4: Simplify right side
   11,300.37x = 120,448,596.31
5. Step 5: Solve for x
   x = 120,448,596.31/11,300.37
6. Step 6: Final answer
   x = 10,658.82