Finding the Fourth Proportional to 11,753.78, 17,620.79 and 5,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,753.78 : 17,620.79 = 5,510.50 : x
2. Step 2: Convert to fraction form
   11,753.78/17,620.79 = 5,510.50/x
3. Step 3: Cross multiply
   11,753.78x = 17,620.79 × 5,510.50
4. Step 4: Simplify right side
   11,753.78x = 97,099,291.69
5. Step 5: Solve for x
   x = 97,099,291.69/11,753.78
6. Step 6: Final answer
   x = 8,261.12