Finding the Fourth Proportional to 30,680.54, 42,353.41 and 23,129.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,680.54 : 42,353.41 = 23,129.94 : x
2. Step 2: Convert to fraction form
   30,680.54/42,353.41 = 23,129.94/x
3. Step 3: Cross multiply
   30,680.54x = 42,353.41 × 23,129.94
4. Step 4: Simplify right side
   30,680.54x = 979,631,832.10
5. Step 5: Solve for x
   x = 979,631,832.10/30,680.54
6. Step 6: Final answer
   x = 31,930.07