Finding the Fourth Proportional to 30,786.16, 42,484.91 and 16,639.01

Step by Step Solution

1. Step 1: Write the proportion equation
   30,786.16 : 42,484.91 = 16,639.01 : x
2. Step 2: Convert to fraction form
   30,786.16/42,484.91 = 16,639.01/x
3. Step 3: Cross multiply
   30,786.16x = 42,484.91 × 16,639.01
4. Step 4: Simplify right side
   30,786.16x = 706,906,842.34
5. Step 5: Solve for x
   x = 706,906,842.34/30,786.16
6. Step 6: Final answer
   x = 22,961.84