Finding the Fourth Proportional to 11,300.12, 15,600.37 and 7,720.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,300.12 : 15,600.37 = 7,720.46 : x
2. Step 2: Convert to fraction form
   11,300.12/15,600.37 = 7,720.46/x
3. Step 3: Cross multiply
   11,300.12x = 15,600.37 × 7,720.46
4. Step 4: Simplify right side
   11,300.12x = 120,441,974.27
5. Step 5: Solve for x
   x = 120,441,974.27/11,300.12
6. Step 6: Final answer
   x = 10,658.47