Finding the Fourth Proportional to 142,234.60, 213,173.34 and 72,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,234.60 : 213,173.34 = 72,131.56 : x
2. Step 2: Convert to fraction form
   142,234.60/213,173.34 = 72,131.56/x
3. Step 3: Cross multiply
   142,234.60x = 213,173.34 × 72,131.56
4. Step 4: Simplify right side
   142,234.60x = 15,376,525,564.61
5. Step 5: Solve for x
   x = 15,376,525,564.61/142,234.60
6. Step 6: Final answer
   x = 108,106.79