Finding the Fourth Proportional to 58,308.29, 87,469.56 and 20,872.31

Step by Step Solution

1. Step 1: Write the proportion equation
   58,308.29 : 87,469.56 = 20,872.31 : x
2. Step 2: Convert to fraction form
   58,308.29/87,469.56 = 20,872.31/x
3. Step 3: Cross multiply
   58,308.29x = 87,469.56 × 20,872.31
4. Step 4: Simplify right side
   58,308.29x = 1,825,691,771.88
5. Step 5: Solve for x
   x = 1,825,691,771.88/58,308.29
6. Step 6: Final answer
   x = 31,311.02