Finding the Fourth Proportional to 72,745.41, 109,144.77 and 30,636.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,745.41 : 109,144.77 = 30,636.09 : x
2. Step 2: Convert to fraction form
   72,745.41/109,144.77 = 30,636.09/x
3. Step 3: Cross multiply
   72,745.41x = 109,144.77 × 30,636.09
4. Step 4: Simplify right side
   72,745.41x = 3,343,768,881.86
5. Step 5: Solve for x
   x = 3,343,768,881.86/72,745.41
6. Step 6: Final answer
   x = 45,965.36