Finding the Fourth Proportional to 30,939.57, 42,696.65 and 16,792.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939.57 : 42,696.65 = 16,792.42 : x
2. Step 2: Convert to fraction form
   30,939.57/42,696.65 = 16,792.42/x
3. Step 3: Cross multiply
   30,939.57x = 42,696.65 × 16,792.42
4. Step 4: Simplify right side
   30,939.57x = 716,980,014.63
5. Step 5: Solve for x
   x = 716,980,014.63/30,939.57
6. Step 6: Final answer
   x = 23,173.56