Finding the Fourth Proportional to 20,111.50, 30,136.04 and 7,624.81

Step by Step Solution

1. Step 1: Write the proportion equation
   20,111.50 : 30,136.04 = 7,624.81 : x
2. Step 2: Convert to fraction form
   20,111.50/30,136.04 = 7,624.81/x
3. Step 3: Cross multiply
   20,111.50x = 30,136.04 × 7,624.81
4. Step 4: Simplify right side
   20,111.50x = 229,781,390.35
5. Step 5: Solve for x
   x = 229,781,390.35/20,111.50
6. Step 6: Final answer
   x = 11,425.38