Finding the Fourth Proportional to 142,155.15, 196,170.33 and 78,491.58

Step by Step Solution

1. Step 1: Write the proportion equation
   142,155.15 : 196,170.33 = 78,491.58 : x
2. Step 2: Convert to fraction form
   142,155.15/196,170.33 = 78,491.58/x
3. Step 3: Cross multiply
   142,155.15x = 196,170.33 × 78,491.58
4. Step 4: Simplify right side
   142,155.15x = 15,397,719,150.82
5. Step 5: Solve for x
   x = 15,397,719,150.82/142,155.15
6. Step 6: Final answer
   x = 108,316.29