Finding the Fourth Proportional to 30,736.49, 42,365.36 and 21,772.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,736.49 : 42,365.36 = 21,772.49 : x
2. Step 2: Convert to fraction form
   30,736.49/42,365.36 = 21,772.49/x
3. Step 3: Cross multiply
   30,736.49x = 42,365.36 × 21,772.49
4. Step 4: Simplify right side
   30,736.49x = 922,399,056.26
5. Step 5: Solve for x
   x = 922,399,056.26/30,736.49
6. Step 6: Final answer
   x = 30,009.91