Finding the Fourth Proportional to 142,111.14, 196,113.18 and 78,448.77

Step by Step Solution

1. Step 1: Write the proportion equation
   142,111.14 : 196,113.18 = 78,448.77 : x
2. Step 2: Convert to fraction form
   142,111.14/196,113.18 = 78,448.77/x
3. Step 3: Cross multiply
   142,111.14x = 196,113.18 × 78,448.77
4. Step 4: Simplify right side
   142,111.14x = 15,384,837,751.79
5. Step 5: Solve for x
   x = 15,384,837,751.79/142,111.14
6. Step 6: Final answer
   x = 108,259.20