Finding the Fourth Proportional to 30,996.56, 42,777.24 and 17,385.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,996.56 : 42,777.24 = 17,385.88 : x
2. Step 2: Convert to fraction form
   30,996.56/42,777.24 = 17,385.88/x
3. Step 3: Cross multiply
   30,996.56x = 42,777.24 × 17,385.88
4. Step 4: Simplify right side
   30,996.56x = 743,719,961.37
5. Step 5: Solve for x
   x = 743,719,961.37/30,996.56
6. Step 6: Final answer
   x = 23,993.63