Finding the Fourth Proportional to 142,339.67, 213,342.78 and 58,047.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,339.67 : 213,342.78 = 58,047.20 : x
2. Step 2: Convert to fraction form
   142,339.67/213,342.78 = 58,047.20/x
3. Step 3: Cross multiply
   142,339.67x = 213,342.78 × 58,047.20
4. Step 4: Simplify right side
   142,339.67x = 12,383,951,019.22
5. Step 5: Solve for x
   x = 12,383,951,019.22/142,339.67
6. Step 6: Final answer
   x = 87,002.81