Finding the Fourth Proportional to 30,640.05, 42,281.69 and 17,211.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,640.05 : 42,281.69 = 17,211.87 : x
2. Step 2: Convert to fraction form
   30,640.05/42,281.69 = 17,211.87/x
3. Step 3: Cross multiply
   30,640.05x = 42,281.69 × 17,211.87
4. Step 4: Simplify right side
   30,640.05x = 727,746,865.60
5. Step 5: Solve for x
   x = 727,746,865.60/30,640.05
6. Step 6: Final answer
   x = 23,751.49