Finding the Fourth Proportional to 30,783.16, 42,480.77 and 16,636.01

Step by Step Solution

1. Step 1: Write the proportion equation
   30,783.16 : 42,480.77 = 16,636.01 : x
2. Step 2: Convert to fraction form
   30,783.16/42,480.77 = 16,636.01/x
3. Step 3: Cross multiply
   30,783.16x = 42,480.77 × 16,636.01
4. Step 4: Simplify right side
   30,783.16x = 706,710,361.82
5. Step 5: Solve for x
   x = 706,710,361.82/30,783.16
6. Step 6: Final answer
   x = 22,957.69