Finding the Fourth Proportional to 142,150.56, 196,162.63 and 78,486.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,150.56 : 196,162.63 = 78,486.99 : x
2. Step 2: Convert to fraction form
   142,150.56/196,162.63 = 78,486.99/x
3. Step 3: Cross multiply
   142,150.56x = 196,162.63 × 78,486.99
4. Step 4: Simplify right side
   142,150.56x = 15,396,214,550.77
5. Step 5: Solve for x
   x = 15,396,214,550.77/142,150.56
6. Step 6: Final answer
   x = 108,309.21