Finding the Fourth Proportional to 30,436.75, 42,002.72 and 18,497.86

Step by Step Solution

1. Step 1: Write the proportion equation
   30,436.75 : 42,002.72 = 18,497.86 : x
2. Step 2: Convert to fraction form
   30,436.75/42,002.72 = 18,497.86/x
3. Step 3: Cross multiply
   30,436.75x = 42,002.72 × 18,497.86
4. Step 4: Simplify right side
   30,436.75x = 776,960,434.18
5. Step 5: Solve for x
   x = 776,960,434.18/30,436.75
6. Step 6: Final answer
   x = 25,527.05