Finding the Fourth Proportional to 142,538.72, 213,803.67 and 67,712.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,538.72 : 213,803.67 = 67,712.72 : x
2. Step 2: Convert to fraction form
   142,538.72/213,803.67 = 67,712.72/x
3. Step 3: Cross multiply
   142,538.72x = 213,803.67 × 67,712.72
4. Step 4: Simplify right side
   142,538.72x = 14,477,228,041.68
5. Step 5: Solve for x
   x = 14,477,228,041.68/142,538.72
6. Step 6: Final answer
   x = 101,566.99