Finding the Fourth Proportional to 142,408.38, 213,659.33 and 58,239.33

Step by Step Solution

1. Step 1: Write the proportion equation
   142,408.38 : 213,659.33 = 58,239.33 : x
2. Step 2: Convert to fraction form
   142,408.38/213,659.33 = 58,239.33/x
3. Step 3: Cross multiply
   142,408.38x = 213,659.33 × 58,239.33
4. Step 4: Simplify right side
   142,408.38x = 12,443,375,675.10
5. Step 5: Solve for x
   x = 12,443,375,675.10/142,408.38
6. Step 6: Final answer
   x = 87,378.12