Finding the Fourth Proportional to 142,878.46, 197,174.50 and 78,353.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,878.46 : 197,174.50 = 78,353.59 : x
2. Step 2: Convert to fraction form
   142,878.46/197,174.50 = 78,353.59/x
3. Step 3: Cross multiply
   142,878.46x = 197,174.50 × 78,353.59
4. Step 4: Simplify right side
   142,878.46x = 15,449,329,931.46
5. Step 5: Solve for x
   x = 15,449,329,931.46/142,878.46
6. Step 6: Final answer
   x = 108,129.17