Finding the Fourth Proportional to 30,620.74, 42,256.31 and 17,191.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620.74 : 42,256.31 = 17,191.69 : x
2. Step 2: Convert to fraction form
   30,620.74/42,256.31 = 17,191.69/x
3. Step 3: Cross multiply
   30,620.74x = 42,256.31 × 17,191.69
4. Step 4: Simplify right side
   30,620.74x = 726,457,382.06
5. Step 5: Solve for x
   x = 726,457,382.06/30,620.74
6. Step 6: Final answer
   x = 23,724.36