Finding the Fourth Proportional to 30,902.95, 42,644.31 and 18,154.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,902.95 : 42,644.31 = 18,154.15 : x
2. Step 2: Convert to fraction form
   30,902.95/42,644.31 = 18,154.15/x
3. Step 3: Cross multiply
   30,902.95x = 42,644.31 × 18,154.15
4. Step 4: Simplify right side
   30,902.95x = 774,171,200.39
5. Step 5: Solve for x
   x = 774,171,200.39/30,902.95
6. Step 6: Final answer
   x = 25,051.69