Finding the Fourth Proportional to 30,872.72, 42,601.82 and 18,124.52

Step by Step Solution

1. Step 1: Write the proportion equation
   30,872.72 : 42,601.82 = 18,124.52 : x
2. Step 2: Convert to fraction form
   30,872.72/42,601.82 = 18,124.52/x
3. Step 3: Cross multiply
   30,872.72x = 42,601.82 × 18,124.52
4. Step 4: Simplify right side
   30,872.72x = 772,137,538.63
5. Step 5: Solve for x
   x = 772,137,538.63/30,872.72
6. Step 6: Final answer
   x = 25,010.35