Finding the Fourth Proportional to 11,488.41, 17,238.08 and 5,245.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,488.41 : 17,238.08 = 5,245.20 : x
2. Step 2: Convert to fraction form
   11,488.41/17,238.08 = 5,245.20/x
3. Step 3: Cross multiply
   11,488.41x = 17,238.08 × 5,245.20
4. Step 4: Simplify right side
   11,488.41x = 90,417,190.33
5. Step 5: Solve for x
   x = 90,417,190.33/11,488.41
6. Step 6: Final answer
   x = 7,870.30