Finding the Fourth Proportional to 11,287.84, 15,562.78 and 7,744.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,287.84 : 15,562.78 = 7,744.90 : x
2. Step 2: Convert to fraction form
   11,287.84/15,562.78 = 7,744.90/x
3. Step 3: Cross multiply
   11,287.84x = 15,562.78 × 7,744.90
4. Step 4: Simplify right side
   11,287.84x = 120,532,174.82
5. Step 5: Solve for x
   x = 120,532,174.82/11,287.84
6. Step 6: Final answer
   x = 10,678.05