Finding the Fourth Proportional to 39,942.42, 55,120.72 and 22,037.96

Step by Step Solution

1. Step 1: Write the proportion equation
   39,942.42 : 55,120.72 = 22,037.96 : x
2. Step 2: Convert to fraction form
   39,942.42/55,120.72 = 22,037.96/x
3. Step 3: Cross multiply
   39,942.42x = 55,120.72 × 22,037.96
4. Step 4: Simplify right side
   39,942.42x = 1,214,748,222.53
5. Step 5: Solve for x
   x = 1,214,748,222.53/39,942.42
6. Step 6: Final answer
   x = 30,412.48