Finding the Fourth Proportional to 30,858.21, 42,584.31 and 16,711.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,858.21 : 42,584.31 = 16,711.02 : x
2. Step 2: Convert to fraction form
   30,858.21/42,584.31 = 16,711.02/x
3. Step 3: Cross multiply
   30,858.21x = 42,584.31 × 16,711.02
4. Step 4: Simplify right side
   30,858.21x = 711,627,256.10
5. Step 5: Solve for x
   x = 711,627,256.10/30,858.21
6. Step 6: Final answer
   x = 23,061.20