Finding the Fourth Proportional to 30,620.72, 42,258.18 and 17,191.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620.72 : 42,258.18 = 17,191.28 : x
2. Step 2: Convert to fraction form
   30,620.72/42,258.18 = 17,191.28/x
3. Step 3: Cross multiply
   30,620.72x = 42,258.18 × 17,191.28
4. Step 4: Simplify right side
   30,620.72x = 726,472,204.67
5. Step 5: Solve for x
   x = 726,472,204.67/30,620.72
6. Step 6: Final answer
   x = 23,724.86