Finding the Fourth Proportional to 11,420.54, 17,131.95 and 3,100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,420.54 : 17,131.95 = 3,100.69 : x
2. Step 2: Convert to fraction form
   11,420.54/17,131.95 = 3,100.69/x
3. Step 3: Cross multiply
   11,420.54x = 17,131.95 × 3,100.69
4. Step 4: Simplify right side
   11,420.54x = 53,120,866.05
5. Step 5: Solve for x
   x = 53,120,866.05/11,420.54
6. Step 6: Final answer
   x = 4,651.34