Finding the Fourth Proportional to 30,938.46, 42,692.71 and 18,192.16

Step by Step Solution

1. Step 1: Write the proportion equation
   30,938.46 : 42,692.71 = 18,192.16 : x
2. Step 2: Convert to fraction form
   30,938.46/42,692.71 = 18,192.16/x
3. Step 3: Cross multiply
   30,938.46x = 42,692.71 × 18,192.16
4. Step 4: Simplify right side
   30,938.46x = 776,672,611.15
5. Step 5: Solve for x
   x = 776,672,611.15/30,938.46
6. Step 6: Final answer
   x = 25,103.79