Finding the Fourth Proportional to 30,969.72, 42,741.84 and 18,394.48

Step by Step Solution

1. Step 1: Write the proportion equation
   30,969.72 : 42,741.84 = 18,394.48 : x
2. Step 2: Convert to fraction form
   30,969.72/42,741.84 = 18,394.48/x
3. Step 3: Cross multiply
   30,969.72x = 42,741.84 × 18,394.48
4. Step 4: Simplify right side
   30,969.72x = 786,213,921.04
5. Step 5: Solve for x
   x = 786,213,921.04/30,969.72
6. Step 6: Final answer
   x = 25,386.54