Finding the Fourth Proportional to 142,184.16, 213,410.16 and 72,113.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,184.16 : 213,410.16 = 72,113.76 : x
2. Step 2: Convert to fraction form
   142,184.16/213,410.16 = 72,113.76/x
3. Step 3: Cross multiply
   142,184.16x = 213,410.16 × 72,113.76
4. Step 4: Simplify right side
   142,184.16x = 15,389,809,059.80
5. Step 5: Solve for x
   x = 15,389,809,059.80/142,184.16
6. Step 6: Final answer
   x = 108,238.56