Finding the Fourth Proportional to 30,939.62, 42,696.71 and 16,792.47

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939.62 : 42,696.71 = 16,792.47 : x
2. Step 2: Convert to fraction form
   30,939.62/42,696.71 = 16,792.47/x
3. Step 3: Cross multiply
   30,939.62x = 42,696.71 × 16,792.47
4. Step 4: Simplify right side
   30,939.62x = 716,983,221.77
5. Step 5: Solve for x
   x = 716,983,221.77/30,939.62
6. Step 6: Final answer
   x = 23,173.63