Finding the Fourth Proportional to 30,940.16, 42,707.79 and 22,013.55

Step by Step Solution

1. Step 1: Write the proportion equation
   30,940.16 : 42,707.79 = 22,013.55 : x
2. Step 2: Convert to fraction form
   30,940.16/42,707.79 = 22,013.55/x
3. Step 3: Cross multiply
   30,940.16x = 42,707.79 × 22,013.55
4. Step 4: Simplify right side
   30,940.16x = 940,150,070.55
5. Step 5: Solve for x
   x = 940,150,070.55/30,940.16
6. Step 6: Final answer
   x = 30,386.08