Finding the Fourth Proportional to 30,986.18, 42,760.91 and 16,839.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,986.18 : 42,760.91 = 16,839.02 : x
2. Step 2: Convert to fraction form
   30,986.18/42,760.91 = 16,839.02/x
3. Step 3: Cross multiply
   30,986.18x = 42,760.91 × 16,839.02
4. Step 4: Simplify right side
   30,986.18x = 720,051,967.71
5. Step 5: Solve for x
   x = 720,051,967.71/30,986.18
6. Step 6: Final answer
   x = 23,237.84