Finding the Fourth Proportional to 30,834.39, 42,551.42 and 16,687.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,834.39 : 42,551.42 = 16,687.20 : x
2. Step 2: Convert to fraction form
   30,834.39/42,551.42 = 16,687.20/x
3. Step 3: Cross multiply
   30,834.39x = 42,551.42 × 16,687.20
4. Step 4: Simplify right side
   30,834.39x = 710,064,055.82
5. Step 5: Solve for x
   x = 710,064,055.82/30,834.39
6. Step 6: Final answer
   x = 23,028.32