Finding the Fourth Proportional to 11,415.96, 17,121.89 and 5,174.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,415.96 : 17,121.89 = 5,174.81 : x
2. Step 2: Convert to fraction form
   11,415.96/17,121.89 = 5,174.81/x
3. Step 3: Cross multiply
   11,415.96x = 17,121.89 × 5,174.81
4. Step 4: Simplify right side
   11,415.96x = 88,602,583.33
5. Step 5: Solve for x
   x = 88,602,583.33/11,415.96
6. Step 6: Final answer
   x = 7,761.29