Finding the Fourth Proportional to 20,100.20, 30,146.18 and 7,615.94

Step by Step Solution

1. Step 1: Write the proportion equation
   20,100.20 : 30,146.18 = 7,615.94 : x
2. Step 2: Convert to fraction form
   20,100.20/30,146.18 = 7,615.94/x
3. Step 3: Cross multiply
   20,100.20x = 30,146.18 × 7,615.94
4. Step 4: Simplify right side
   20,100.20x = 229,591,309.30
5. Step 5: Solve for x
   x = 229,591,309.30/20,100.20
6. Step 6: Final answer
   x = 11,422.34