Finding the Fourth Proportional to 30,976.84, 42,715.38 and 22,015

Step by Step Solution

1. Step 1: Write the proportion equation
   30,976.84 : 42,715.38 = 22,015 : x
2. Step 2: Convert to fraction form
   30,976.84/42,715.38 = 22,015/x
3. Step 3: Cross multiply
   30,976.84x = 42,715.38 × 22,015
4. Step 4: Simplify right side
   30,976.84x = 940,379,090.70
5. Step 5: Solve for x
   x = 940,379,090.70/30,976.84
6. Step 6: Final answer
   x = 30,357.49