Finding the Fourth Proportional to 30,939.35, 42,696.05 and 16,792.19

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939.35 : 42,696.05 = 16,792.19 : x
2. Step 2: Convert to fraction form
   30,939.35/42,696.05 = 16,792.19/x
3. Step 3: Cross multiply
   30,939.35x = 42,696.05 × 16,792.19
4. Step 4: Simplify right side
   30,939.35x = 716,960,099.89
5. Step 5: Solve for x
   x = 716,960,099.89/30,939.35
6. Step 6: Final answer
   x = 23,173.08