Finding the Fourth Proportional to 30,698.54, 42,364.05 and 18,124.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,698.54 : 42,364.05 = 18,124.10 : x
2. Step 2: Convert to fraction form
   30,698.54/42,364.05 = 18,124.10/x
3. Step 3: Cross multiply
   30,698.54x = 42,364.05 × 18,124.10
4. Step 4: Simplify right side
   30,698.54x = 767,810,278.61
5. Step 5: Solve for x
   x = 767,810,278.61/30,698.54
6. Step 6: Final answer
   x = 25,011.30