Finding the Fourth Proportional to 20,498.88, 30,740.16 and 7,347.20

Step by Step Solution

1. Step 1: Write the proportion equation
   20,498.88 : 30,740.16 = 7,347.20 : x
2. Step 2: Convert to fraction form
   20,498.88/30,740.16 = 7,347.20/x
3. Step 3: Cross multiply
   20,498.88x = 30,740.16 × 7,347.20
4. Step 4: Simplify right side
   20,498.88x = 225,854,103.55
5. Step 5: Solve for x
   x = 225,854,103.55/20,498.88
6. Step 6: Final answer
   x = 11,017.88