Finding the Fourth Proportional to 30,908.42, 42,641.56 and 20,165.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,908.42 : 42,641.56 = 20,165.94 : x
2. Step 2: Convert to fraction form
   30,908.42/42,641.56 = 20,165.94/x
3. Step 3: Cross multiply
   30,908.42x = 42,641.56 × 20,165.94
4. Step 4: Simplify right side
   30,908.42x = 859,907,140.47
5. Step 5: Solve for x
   x = 859,907,140.47/30,908.42
6. Step 6: Final answer
   x = 27,821.13