Finding the Fourth Proportional to 142,192.80, 196,216.16 and 78,525.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,192.80 : 196,216.16 = 78,525.59 : x
2. Step 2: Convert to fraction form
   142,192.80/196,216.16 = 78,525.59/x
3. Step 3: Cross multiply
   142,192.80x = 196,216.16 × 78,525.59
4. Step 4: Simplify right side
   142,192.80x = 15,407,988,357.83
5. Step 5: Solve for x
   x = 15,407,988,357.83/142,192.80
6. Step 6: Final answer
   x = 108,359.84