Finding the Fourth Proportional to 11,644.69, 17,468.78 and 5,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,644.69 : 17,468.78 = 5,405.34 : x
2. Step 2: Convert to fraction form
   11,644.69/17,468.78 = 5,405.34/x
3. Step 3: Cross multiply
   11,644.69x = 17,468.78 × 5,405.34
4. Step 4: Simplify right side
   11,644.69x = 94,424,695.29
5. Step 5: Solve for x
   x = 94,424,695.29/11,644.69
6. Step 6: Final answer
   x = 8,108.82