Finding the Fourth Proportional to 30,906.76, 42,651.78 and 18,156.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30,906.76 : 42,651.78 = 18,156.76 : x
2. Step 2: Convert to fraction form
   30,906.76/42,651.78 = 18,156.76/x
3. Step 3: Cross multiply
   30,906.76x = 42,651.78 × 18,156.76
4. Step 4: Simplify right side
   30,906.76x = 774,418,133.03
5. Step 5: Solve for x
   x = 774,418,133.03/30,906.76
6. Step 6: Final answer
   x = 25,056.59