Finding the Fourth Proportional to 142,519.77, 196,681.37 and 78,863.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,519.77 : 196,681.37 = 78,863.49 : x
2. Step 2: Convert to fraction form
   142,519.77/196,681.37 = 78,863.49/x
3. Step 3: Cross multiply
   142,519.77x = 196,681.37 × 78,863.49
4. Step 4: Simplify right side
   142,519.77x = 15,510,978,861.86
5. Step 5: Solve for x
   x = 15,510,978,861.86/142,519.77
6. Step 6: Final answer
   x = 108,833.88