Finding the Fourth Proportional to 30,412.72, 45,623.67 and 13,772.35

Step by Step Solution

1. Step 1: Write the proportion equation
   30,412.72 : 45,623.67 = 13,772.35 : x
2. Step 2: Convert to fraction form
   30,412.72/45,623.67 = 13,772.35/x
3. Step 3: Cross multiply
   30,412.72x = 45,623.67 × 13,772.35
4. Step 4: Simplify right side
   30,412.72x = 628,345,151.52
5. Step 5: Solve for x
   x = 628,345,151.52/30,412.72
6. Step 6: Final answer
   x = 20,660.60