Finding the Fourth Proportional to 142,238.16, 213,491.16 and 72,167.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,238.16 : 213,491.16 = 72,167.76 : x
2. Step 2: Convert to fraction form
   142,238.16/213,491.16 = 72,167.76/x
3. Step 3: Cross multiply
   142,238.16x = 213,491.16 × 72,167.76
4. Step 4: Simplify right side
   142,238.16x = 15,407,178,797.00
5. Step 5: Solve for x
   x = 15,407,178,797.00/142,238.16
6. Step 6: Final answer
   x = 108,319.59