Finding the Fourth Proportional to 30,746.72, 42,434.55 and 17,320.64

Step by Step Solution

1. Step 1: Write the proportion equation
   30,746.72 : 42,434.55 = 17,320.64 : x
2. Step 2: Convert to fraction form
   30,746.72/42,434.55 = 17,320.64/x
3. Step 3: Cross multiply
   30,746.72x = 42,434.55 × 17,320.64
4. Step 4: Simplify right side
   30,746.72x = 734,993,351.94
5. Step 5: Solve for x
   x = 734,993,351.94/30,746.72
6. Step 6: Final answer
   x = 23,904.77