Finding the Fourth Proportional to 30,521.98, 42,123.81 and 18,592.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,521.98 : 42,123.81 = 18,592.30 : x
2. Step 2: Convert to fraction form
   30,521.98/42,123.81 = 18,592.30/x
3. Step 3: Cross multiply
   30,521.98x = 42,123.81 × 18,592.30
4. Step 4: Simplify right side
   30,521.98x = 783,178,512.66
5. Step 5: Solve for x
   x = 783,178,512.66/30,521.98
6. Step 6: Final answer
   x = 25,659.49