Finding the Fourth Proportional to 11,729.76, 17,600.34 and 5,155.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,729.76 : 17,600.34 = 5,155.09 : x
2. Step 2: Convert to fraction form
   11,729.76/17,600.34 = 5,155.09/x
3. Step 3: Cross multiply
   11,729.76x = 17,600.34 × 5,155.09
4. Step 4: Simplify right side
   11,729.76x = 90,731,382.07
5. Step 5: Solve for x
   x = 90,731,382.07/11,729.76
6. Step 6: Final answer
   x = 7,735.14