Finding the Fourth Proportional to 142,408.57, 213,659.61 and 58,239.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,408.57 : 213,659.61 = 58,239.52 : x
2. Step 2: Convert to fraction form
   142,408.57/213,659.61 = 58,239.52/x
3. Step 3: Cross multiply
   142,408.57x = 213,659.61 × 58,239.52
4. Step 4: Simplify right side
   142,408.57x = 12,443,432,170.69
5. Step 5: Solve for x
   x = 12,443,432,170.69/142,408.57
6. Step 6: Final answer
   x = 87,378.40