Finding the Fourth Proportional to 40,216.72, 60,305.58 and 12,131.58

Step by Step Solution

1. Step 1: Write the proportion equation
   40,216.72 : 60,305.58 = 12,131.58 : x
2. Step 2: Convert to fraction form
   40,216.72/60,305.58 = 12,131.58/x
3. Step 3: Cross multiply
   40,216.72x = 60,305.58 × 12,131.58
4. Step 4: Simplify right side
   40,216.72x = 731,601,968.22
5. Step 5: Solve for x
   x = 731,601,968.22/40,216.72
6. Step 6: Final answer
   x = 18,191.49