Finding the Fourth Proportional to 11,477.22, 17,220.42 and 5,240.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,477.22 : 17,220.42 = 5,240.18 : x
2. Step 2: Convert to fraction form
   11,477.22/17,220.42 = 5,240.18/x
3. Step 3: Cross multiply
   11,477.22x = 17,220.42 × 5,240.18
4. Step 4: Simplify right side
   11,477.22x = 90,238,014.37
5. Step 5: Solve for x
   x = 90,238,014.37/11,477.22
6. Step 6: Final answer
   x = 7,862.36