Finding the Fourth Proportional to 30,953.34, 42,721.83 and 18,385.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,953.34 : 42,721.83 = 18,385.38 : x
2. Step 2: Convert to fraction form
   30,953.34/42,721.83 = 18,385.38/x
3. Step 3: Cross multiply
   30,953.34x = 42,721.83 × 18,385.38
4. Step 4: Simplify right side
   30,953.34x = 785,457,078.85
5. Step 5: Solve for x
   x = 785,457,078.85/30,953.34
6. Step 6: Final answer
   x = 25,375.52